Updated on 2021/03/29

写真a

 
KAWASAKI Takeshi
 
Organization
Graduate School of Science Division of Material Science Fundamental Condensed Matter Physics Lecturer
Title
Lecturer
Contact information
メールアドレス

Degree 1

  1. Doctor (Engineering) ( 2010.3   The University of Tokyo ) 

Research Areas 2

  1. Natural Science / Biophysics, chemical physics and soft matter physics  / glass transition

  2. Natural Science / Biophysics, chemical physics and soft matter physics  / Phase transition dynamics

Research History 5

  1. Nagoya University   Lecturer

    2020.3

  2. Nagoya University   Department of physics,   Assistant Professor

    2015.3 - 2020.2

  3. CNRS post-doc researcher

    2013.4 - 2015.2

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    Country:France

  4. JSPS Fellowship (PD)

    2010.4 - 2013.3

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    Country:Japan

  5. JSPS Fellowship (DC2)

    2008.4 - 2010.3

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    Country:Japan

Education 3

  1. The University of Tokyo   Graduate School, Division of Engineering   Deartment of Applied Physics

    2007.4 - 2010.3

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    Country: Japan

  2. The University of Tokyo   Graduate School, Division of Engineering   Deartment of Applied Physics

    2005.4 - 2007.3

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    Country: Japan

  3. Keio University   Faculty of Science and Engineering

    2001.4 - 2005.3

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    Country: Japan

Professional Memberships 1

  1. Japan Physical Society

Committee Memberships 1

  1. 日本物理学会 領域12 運営委員   化学物理分野 運営委員  

    2015.10 - 2016.9   

Awards 10

  1. The MEXT Young Scientists’ Prize

    2020.4  

    Takeshi Kawasaki

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    Country:Japan

  2. The 13th Condensed matter prize

    2018.11  

    Takeshi Kawasaki

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    Country:Japan

  3. Young Scientist Award (Division 12)

    2015.3  

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    Country:Japan

  4. Editors' suggestion (Physical Review E)

    2015.1  

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    Country:United States

  5. Editors' suggestion (Physical Review E)

    2015.1  

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    Country:United States

  6. Best oral presentation award for junior researchers

    2014.7  

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    Country:France

  7. Editors' choices for 2011 (The Journal of Chemical Physics)

    2011.3  

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    Country:United States

  8. Editors' choices for 2011 (The Journal of Chemical Physics)

    2011.3  

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    Country:United States

  9. Journal of Physics: Condensed Matter's 2010 Highlights

    2010.3  

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    Country:United Kingdom

  10. Best presentation award for students

    2007.9  

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    Country:Japan

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Papers 52

  1. Acoustic resonance in periodically sheared glass: damping due to plastic events Invited Reviewed

    Takeshi Kawasaki and Akira Onuki

    Soft Matter   Vol. 16   page: 9357   2020.8

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/d0sm00856g

  2. Active microrheology of a bulk metallic glass Reviewed International coauthorship

    Ji Woong Yu, S. H. E. Rahbari, Takeshi Kawasaki, Hyunggyu Park, Won Bo Lee

    Science Advances   Vol. 6   page: eaba8766   2020.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1126/sciadv.aba8766

  3. Glass stability changes the nature of yielding under oscillatory shear Reviewed

    Wei-Ting Yeh, Misaki Ozawa, Kunimasa Miyazaki, Takeshi Kawasaki, Ludovic Berthier

    Physical Review Letters   Vol. 124   page: 225502   2020.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevLett.124.225502

  4. Critical scaling of diffusion coefficients and size of rigid clusters of soft athermal particles under shear, Invited Reviewed

    Kuniyasu Saitoh and Takeshi Kawasaki

    Frontiers in Physics   Vol. 8   page: 99   2020.4

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    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.3389/fphy.2020.00099

  5. Universal relaxation dynamics of sphere packings below jamming Reviewed

    Atsushi Ikeda, Takeshi Kawasaki, Ludovic Berthier, Kuniyasu Saitoh, and Takahiro Hatano

    Physical Review Letters   Vol. 124   page: 058001   2020.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevLett.124.058001

    DOI: 10.1103/PhysRevLett.124.058001

  6. Local density fluctuation governs the divergence of viscosity underlying elastic and hydrodynamic anomalies in a 2D glass-forming liquid Reviewed

    Hayato Shiba, Takeshi Kawasaki, and Kang Kim

    Physical Review Letters   Vol. 123   page: 265501-1 - 265501-5   2019

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    Language:English   Publishing type:Research paper (scientific journal)  

  7. Glassy dynamics of a model of bacterial cytoplasm with metabolic activities

    Norihiro Oyama, Takeshi Kawasaki, Hideyuki Mizuno, Atsushi Ikeda

    Physical Review Research   Vol. 15   page: 032038(R)   2019

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    Language:English   Publishing type:Research paper (scientific journal)  

  8. Classification of the reversible-irreversible transitions in particle trajectories across the jamming transition point Reviewed

    Kentaro Nagasawa, Kunimasa Miyazaki, and Takeshi Kawasaki

    Soft Matter   Vol. 15   page: 7557   2019.9

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/C9SM01488H

  9. Theory of Shear Modulus in Glasses Invited

    Akira Onuki, Takeshi Kawasaki

    The Journal of Chemical Physics   Vol. 150   page: 124504   2019.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.5082154

  10. Slow dynamics coupled with cluster formation in ultrasoft-potential glasses

    Ryoji Miyazaki, Takeshi Kawasaki and Kunimasa Miyazaki

    The Journal of Chemical Physics   Vol. 150   page: 074503   2019.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.5086379

  11. Classification of mobile- and immobile-molecule timescales for the Stokes-Einstein and Stokes-Einstein-Debye relations in supercooled water

    Takeshi Kawasaki, Kang Kim

    Journal of Statistical Mechanics: Theory and Experiment   Vol. 2019   page: 084004   2019

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/1742-5468/ab3114

  12. Discontinuous shear thickening in Brownian suspension Reviewed

    Takeshi Kawasaki, Ludovic Berthier

    Physical Review E   Vol. 98   page: 012609   2018.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevE.98.012609

  13. Excitation of vibrational soft modes in disordered systems using active oscillation Invited Reviewed

    Elsen Tjhung, Takeshi Kawasaki

    Soft Matter   Vol. 13   page: 111-118   2017

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/C6SM00788K

  14. Spurious violation of the Stokes-Einstein-Debye relation in supercooled water

    Takeshi Kawasaki, Kang Kim

    Scientific Reports   Vol. 9   page: 8118   2019.5

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 8118

  15. Prediction and classification in equation-free collective motion dynamics Reviewed

    Keisuke Fujii, Takeshi Kawasaki, Yuki Inaba, and Yoshinobu Kawahara

    PLOS Computational Biology   Vol. 14   page: e1006545   2018.11

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1371/journal.pcbi.1006545

  16. Isolating long-wavelength fluctuation from the structural relaxation in two-dimensional glass: cage-relative displacement, Invited Reviewed

    Hayato Shiba, Peter Keim, Takeshi Kawasaki

    Journal of Physics: Condensed Matter   Vol. 30   page: 094004   2018.2

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/1361-648X/aaa8b8

  17. Acoustic resonance in periodically sheared glass

    Takeshi Kawasaki and Akira Onuki

    arXiv     page: 1708.03166   2017

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    Language:English   Publishing type:Research paper (scientific journal)  

  18. Unveiling Dimensionality Dependence of Glassy Dynamics: 2D Infinite Fluctuation Eclipses Inherent Structural Relaxation Reviewed

    Hayato Shiba, Yasunori Yamada,Takeshi Kawasaki, and Kang Kim

    Physical Review Letters   Vol. 117   page: 245701   2016.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevLett.117.245701

  19. Macroscopic yielding in jammed solids is accompanied by a nonequilibrium first-order transition in particle trajectories Reviewed

    Takeshi Kawasaki and Ludovic Berthier

    Physical Review E   Vol. 94   page: 022615-1 - 022615-6   2016.8

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevE.94.022615

  20. Identification of time-scales that support violation or preservation of Stokes-Einstein relation in supercooled water

    Takeshi Kawasaki and Kang Kim

    Science Advances   Vol. 3   page: e1700399   2017.8

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1126/sciadv.1700399

  21. Glassy dynamics of a model of bacterial cytoplasm with metabolic activities, Reviewed

    Norihiro Oyama, Takeshi Kawasaki, Hideyuki Mizuno, Atsushi Ikeda

    Physical Review Research   Vol. 1   page: 032038(R)   2019.12

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    Language:English  

  22. Various types of reversible-irreversible transitions in particle trajectory near jamming transition

    Nagasawa Kentaro, Miyazaki Kunimasa, Kawasaki Takeshi

    Meeting Abstracts of the Physical Society of Japan   Vol. 73 ( 0 ) page: 3027 - 3027   2018

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    Publisher:The Physical Society of Japan  

    DOI: 10.11316/jpsgaiyo.73.1.0_3027

    CiNii Article

  23. Cluster Glass Transition of Ultrasoft-Potential Fluids at High Density Reviewed

    Ryoji Miyazaki, Takeshi Kawasaki, and Kunimasa Miyazaki

    Physical Review Letters   Vol. 17   page: 165701   2016.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevLett.117.165701

  24. 21aBF-5 Discontinuous shear thickening in colloidal suspensions

    Kawasaki Takeshi, Berthier Ludovic

    Meeting Abstracts of the Physical Society of Japan   Vol. 71 ( 0 )   2016

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    Publisher:The Physical Society of Japan  

    DOI: 10.11316/jpsgaiyo.71.1.0_3211

    CiNii Article

  25. First order like reversible-irreversible transition in oscillatory sheared suspensions

    Kawasaki Takeshi, Berthier Ludovic

    Meeting Abstracts of the Physical Society of Japan   Vol. 71 ( 0 ) page: 2817 - 2817   2016

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    Publisher:The Physical Society of Japan  

    DOI: 10.11316/jpsgaiyo.71.2.0_2817

    CiNii Article

  26. Erratum: Excitation of vibrational soft modes in disordered systems using active oscillation (Soft Matter (2016) DOI:10.1039/c6sm00788k) Reviewed

    Elsen Tjhung, Takeshi Kawasaki

    Soft Matter   Vol. 12 ( 24 ) page: 5490   2016

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Royal Society of Chemistry  

    DOI: 10.1039/c6sm90096h

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    PubMed

  27. Diverging viscosity and soft granular rheology in non-Brownian suspensions Reviewed

    Takeshi Kawasaki,Daniele Coslovich, Atsushi Ikeda, and Ludovic Berthier

    Physical Review E   Vol. 91   page: 012203   2015.1

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1103/PhysRevE.91.012203

  28. 19aCX-7 Diverging viscosity and plastic flow close to jamming and glass transitions

    Kawasaki Takeshi

    Meeting Abstracts of the Physical Society of Japan   Vol. 70 ( 0 ) page: 2845 - 2846   2015

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    Publisher:The Physical Society of Japan  

    DOI: 10.11316/jpsgaiyo.70.2.0_2845

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  29. モンペリエ第二大学滞在記

    川﨑 猛史

    アンサンブル   Vol. 17 ( 3 ) page: 181 - 184   2015

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    Publisher:分子シミュレーション研究会  

    DOI: 10.11436/mssj.17.181

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  30. Thinning or thickening? Multiple rheological regimes in dense suspensions of soft particles Reviewed

    Takeshi Kawasaki, Atsushi Ikeda, Ludovic Berthier

    EPL   Vol. 107 ( 2 ) page: 28009   2014.7

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: doi:10.1209/0295-5075/107/28009

  31. Structural evolution in the aging process of supercooled colloidal liquids Reviewed

    Takeshi Kawasaki, Hajime Tanaka

    Physical Review E   Vol. 89   page: 062315   2014.6

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: http://dx.doi.org/10.1103/PhysRevE.89.062315

  32. Dynamics in a tetrahedral network glassformer: Vibrations, network rearrangements, and diffusion Reviewed

    Takeshi Kawasaki, Kang Kim, Akira Onuki

    The Journal of Chemical Physics   Vol. 140   page: 184502   2014.5

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: http://dx.doi.org/10.1063/1.4873346

  33. Spatiotemporal Heterogeneity of Local Free Volumes in a Highly Supercooled Liquid Reviewed

    Hayato Shiba,Takeshi Kawasaki

    The Journal of Chemical Physics   Vol. 139   page: 184502   2013.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: http://dx.doi.org/10.1063/1.4829442

  34. Spatiotemporal heterogeneity of local free volumes in highly supercooled liquid Reviewed

    Hayato Shiba, Takeshi Kawasaki

    JOURNAL OF CHEMICAL PHYSICS   Vol. 139 ( 18 ) page: 184502   2013.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER INST PHYSICS  

    We discuss the spatiotemporal behavior of local density and its relation to dynamical heterogeneity in a highly supercooled liquid by using molecular dynamics simulations of a binary mixture with different particle sizes in two dimensions. To trace voids heterogeneously existing with lower local densities, which move along with the structural relaxation, we employ the minimum local density for each particle in a time window whose width is set along with the structural relaxation time. Particles subject to free volumes correspond well to the configuration rearranging region of dynamical heterogeneity. While the correlation length for dynamical heterogeneity grows with temperature decrease, no growth in the correlation length of heterogeneity in the minimum local density distribution takes place. A comparison of these results with those of normal mode analysis reveals that superpositions of lower-frequency soft modes extending over the free volumes exhibit spatial correlation with the broken bonds. This observation suggests a possibility that long-ranged vibration modes facilitate the interactions between fragile regions represented by free volumes, to induce dynamical correlations at a large scale. (C) 2013 AIP Publishing LLC.

    DOI: 10.1063/1.4829442

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    PubMed

  35. Slow relaxations and stringlike jump motions in fragile glass-forming liquids: Breakdown of the Stokes-Einstein relation Reviewed

    Takeshi Kawasaki, Akira Onuki

    Physical Review E   Vol. 87   page: 012312   2013.1

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    DOI: http://dx.doi.org/10.1103/PhysRevE.87.012312

  36. Dynamics of thermal vibrational motions and stringlike jump motions in three-dimensional glass-forming liquids Invited Reviewed

    Takeshi Kawasaki, Akira Onuki

    The Journal of Chemical Physics   Vol. 138   page: 12A514   2013.1

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: http://dx.doi.org/10.1063/1.4770337

  37. Hierarchical heterogeneous glassy dynamics of configuration changes and vibration modes Invited Reviewed

    Takeshi Kawasaki, Hayato Shiba, Akira Onuki

    AIP Conference Proceedings   Vol. 1518   page: 784 - 791   2013

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)  

    To understand the quantitative properties of dynamic heterogeneities on glassy particle systems, we use the theoretical scheme of bond-breakage which can detect configuration rearrangements corresponding to the structural relaxations. It is compared with the four-point correlation scheme for the results of binary mixtures with molecular dynamics simulations of two dimensional NVE ensembles. From the comparisons in the systems, we find superpositions of heterogeneity of configuration rearrangements and that induced by low-frequency vibration modes. The bond breakage scheme detects the long-time relaxations without short-time vibrations. The four-point scheme detects the mixed dynamics of the both. We find that the results on four-point scheme are sensitive to the influence of such vibration modes which gives rise to detectable system-size effects in physical properties. © 2013 American Institute of Physics.

    DOI: 10.1063/1.4794679

    Scopus

  38. Spontaneous bond orientational ordering in liquids: An intimate link between glass transition and crystallization Invited Reviewed

    Hajime Tanaka, John Russo, Mathieu Leocmach, Takeshi Kawasaki

    4TH INTERNATIONAL SYMPOSIUM ON SLOW DYNAMICS IN COMPLEX SYSTEMS: KEEP GOING TOHOKU   Vol. 1518   page: 143 - 152   2013

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:AMER INST PHYSICS  

    The origin of slow dynamics near glass transition and the mechanism of crystal nucleation are two unsolved fundamental problems associated with the metastable supercooled state of a liquid. So far these phenomena have been considered rather independently, however, we have revealed an intimate link between them. Recently we found that crystal-like bond orientational order develops in the supercooled state of (nearly) single-component systems such as spin liquids and weakly polydisperse colloidal liquids. In these liquids, low free-energy configurations in a supercooled liquid have a link to the rotational symmetry which is going to be broken upon crystallization. We argue that this is a direct consequence of that the same free energy governs both glass transition and crystallization at least in this type of liquids. We found that it is such structural ordering at least in this type of liquids that causes glassy slow dynamics and dynamic heterogeneity. Furthermore, we revealed that such structural order also plays a crucial role in crystal nucleation: Crystallization is a process of the enhancement of spatial coherence of crystal-like bond orientational order and 'not' driven by translational order at least in the nucleation stage. These results clearly indicate that the theoretical description at the two-body level is not enough to describe these phenomena and it is crucial to take into account many body correlations, particularly, bond orientational correlations. We argue that there is an intrinsic link between glass transition and crystallization if crystallization does not accompany other processes such as phase separation. If crystallization involves phase separation, on the other hand, such a direct link may be lost. We speculate that even in such a case glassy structural order may still be associated with low free-energy local configurations.

    DOI: 10.1063/1.4794561

    Web of Science

  39. Relationship between bond-breakage correlations and four-point correlations in heterogeneous glassy dynamics: Configuration changes and vibration modes Reviewed

    Hayato Shiba,Takeshi Kawasaki, and Akira Onuki

    Physical Review E   Vol. 86   page: 041504   2012.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: http://dx.doi.org/10.1103/PhysRevE.86.041504

  40. Rheology of Solids Reviewed

    Takeshi Kawasaki, Akira Onuki

    NIHON REOROJI GAKKAISHI   Vol. 40 ( 3 ) page: 151 - 155   2012

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:SOC RHEOLOGY, JAPAN  

    We review our recent studies on the structural disorder in crystal, polycrystal, and glass in a Lennard-Jones binary mixture in three dimensions using molecular dynamics simulation. At a low temperature, the crossovers among these states occur as the amount of the large particles is varied. We define a disorder variable D-j (t) for each particle j in terms of local bond order parameters based on spherical harmonics (Steinhardt order parameters). Mesoscopic structural heterogeneity in glass is then visualized. In fcc crystal and polycrystal, we show that stacking faults play an important role in plasticity.

    Web of Science

  41. Construction of a disorder variable from Steinhardt order parameters in binary mixtures at high densities in three dimensions Reviewed

    Takeshi Kawasaki, Akira Onuki

    The Journal of Chemical Physics   Vol. 135   page: 174109   2011.11

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: http://dx.doi.org/10.1063/1.3656762

  42. Structural signature of slow dynamics and dynamic heterogeneity in two-dimensional colloidal liquids: glassy structural order Reviewed

    Takeshi Kawasaki, Hajime Tanaka

    Journal of Physics: Condensed Matter   Vol. 23 ( 19 ) page: 194121   2011.4

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: doi:10.1088/0953-8984/23/19/194121

  43. Structural origin of enhanced slow dynamics near a wall in glass-forming systems Reviewed

    Keiji Watanabe, Takeshi Kawasaki, and Hajime Tanaka

    Nature Materials   Vol. 10   page: 512   2011.4

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: doi:10.1038/nmat3034

  44. Formation of a crystal nucleus from liquid Reviewed

    Takeshi Kawasaki, Hajime Tanaka

    PNAS   Vol. 107 ( 32 ) page: 14036   2010.6

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: doi: 10.1073/pnas.1001040107

  45. Structural origin of dynamic heterogeneity in three-dimensional colloidal glass formers and its link to crystal nucleation Reviewed

    Takeshi Kawasaki, Hajime Tanaka

    Journal of Physics: Condensed Matter   Vol. 22 ( 23 ) page: 232102   2010.5

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    DOI: doi:10.1088/0953-8984/22/23/232102

  46. Critical-like behaviour of glass-forming liquids Reviewed

    Hajime Tanaka, Takeshi Kawasaki, Hiroshi Shintani, Keiji Watanabe

    Nature Materials   Vol. 9   page: 324   2010.1

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: doi:10.1038/nmat2634

  47. Apparent Violation of the Fluctuation-Dissipation Theorem due to Dynamic Heterogeneity in a Model Glass-Forming Liquid Reviewed

    Takeshi Kawasaki, Hajime Tanaka

    Physical Review Letters   Vol. 102   page: 185701   2009.5

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: http://dx.doi.org/10.1103/PhysRevLett.102.185701

  48. Reply to the comment on Correlation between Dynamic Heterogeneity and Medium-Range Order in Two-Dimensional Glass-Forming Liquids Reviewed

    Takeshi Kawasaki, Hajime Tanaka

    Physical Review Letters   Vol. 100   page: 099602   2008.3

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    DOI: http://dx.doi.org/10.1103/PhysRevLett.100.099602

  49. Comment on "Correlation between dynamic heterogeneity and medium-range order in two-dimensional glass-forming liquids" - Reply Reviewed

    Takeshi Kawasaki, Takeaki Araki, Hajime Tanaka

    PHYSICAL REVIEW LETTERS   Vol. 100 ( 9 ) page: 099602   2008.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:AMER PHYSICAL SOC  

    DOI: 10.1103/PhysRevLett.100.099602

    Web of Science

  50. Kawasaki, Araki, and Tanaka Reply: Reviewed

    T. Kawasaki, T. Araki, H. Tanaka

    Physical Review Letters   Vol. 100 ( 9 )   2008

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    DOI: 10.1103/PhysRevLett.100.099602

  51. Link between vitrification and crystallization in two-dimensional polydisperse colloidal liquid Invited Reviewed

    T. Kawasaki, T. Araki, H. Tanaka

    COMPLEX SYSTEMS-BOOK 1   Vol. 982   page: 238 - 240   2008

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    Authorship:Lead author   Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:AMER INST PHYSICS  

    Glasses are formed if crystallization is avoided upon cooling or increasing density. However, the physical factors controlling the ease of vitrification and nature of the glass transition remain elusive. We use numerical simulations of polydisperse hard disks to tackle both of these longstanding questions. Here we systematically control the polydispersity in two-dimensional colloidal simulations, i.e., the strength of frustration effects on crystallization. We demonstrate that medium-range crystalline order grows in size and lifetime with an increase in the colloid volume fraction or a decrease in polydispersity (or, frustration). We find a direct relation between medium-range crystalline ordering and the slow dynamics that characterizes the glass transition. This suggests an intriguing scenario that the strength of frustration controls both the ease of vitrification and nature of the glass transition at least in this system. Vitrification may be a process of hidden crystalline ordering under frustration. This not only provides a physical basis for glass formation, but also an answer to a longstanding question on the structure of amorphous materials: "order in disorder" may be an intrinsic feature of a glassy state of material. Thus our scenario makes a natural connection between structure and dynamics in glass-forming materials, although its relevance should be carefully checked for 3D glass-forming liquids.

    Web of Science

  52. Correlation between Dynamic Heterogeneity and Medium-Range Order in Two-Dimensional Glass-Forming Liquids Reviewed

    Takeshi Kawasaki, Takeaki Araki, Hajime Tanaka

    Physical Review Letters   Vol. 99   page: 215701   2007.11

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: http://dx.doi.org/10.1103/PhysRevLett.99.215701

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Presentations 11

  1. A non-equilibrium phase transition in particle trajectories near the jamming transition Invited International conference

    Takeshi Kawasaki

    Soft Matter Physics: from the perspective of the essential heterogeneity  2018.12.12 

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Fukuoka  

  2. 周期振動下高密度分散系の粒子軌道に関する可 逆・不可逆不連続転移

    川﨑 猛史

    第 30 回分子シミュレーション討論会  2016.12.2 

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    Language:Japanese  

  3. 周期剪断を与えた高密度分散系の粒子軌道に関する可 逆・不可逆非平衡相転移" Invited

    川﨑 猛史

    特別講演会 「粒子系の構造形成と不均一変形のダイナミクス  2017.1.23 

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    Language:Japanese  

  4. 古典的異方粒子系における相転移ダイナミクス” Invited

    川﨑猛史

    新学術領域研究「量子液晶の物性科学」C01班公募研究キックオフミーティング  2020.7.8 

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    Language:Japanese  

  5. Discontinuous shear-thickening in Brownian suspensions

    2018.9.9 

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:Doshisya University, Kyoto  

  6. ジャミング転移点近傍における粒子軌道の可逆性に関する非平衡相転移

    川﨑 猛史

    第32回分子シミュレーション討論会  2018.11.28 

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    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:筑波 産総研  

  7. ジャミング転移点近傍にある周期剪断下高密度分散系における粒子軌道の可逆・不可逆転移 Reversible-irreversible transitions in particle trajectories in oscillatory sheared systems near the jamming transition"

    永澤謙太郎, 宮崎州正, 川崎猛史

    日本物理学会 2017年度年次大会 岩手大学 

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    Language:English  

  8. Reversible-Irreversible transition in particle trajectories near the jamming transition Invited International conference

    Takeshi Kawasaki

    2019 International Workshop on Soft Matter and Biophysics Theories (SMTB2019) BTG Fragrance Hill Hotel, Beijing  2019.5.11 

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    Language:English   Presentation type:Oral presentation (invited, special)  

  9. Melting Phenomena in Two-Dimensional Anisotropic Particles Invited

    Takeshi Kawasaki

    FYR02 QLC meeting  2020.12.23 

  10. Classification of the reversible-irreversible transitions in particle trajectories near the jamming transition International conference

    Takeshi Kawasaki

    Rheology of disordered particles — suspensions, glassy and granular materials:part II  2018.6.28 

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    Language:English   Presentation type:Oral presentation (general)  

    Venue:Kyoto  

  11. A non-equilibrium phase transition in particle trajectories near the jamming transition Invited International conference

    Takeshi Kawasaki

    International mini-workshop on Nonequlibrium transport and phase transition in novel materials  2018.11.26 

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    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Nagoya  

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Research Project for Joint Research, Competitive Funding, etc. 1

  1. Designing reconfigurable soft materials using light-activated rotational jamming

    2017.05 - 2019.05

    Takeshi Kawasaki and Lilian Hsiao

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    Grant type:Competitive

KAKENHI (Grants-in-Aid for Scientific Research) 11

  1. 液晶秩序を発現する古典異方粒子系における相転移ダイナミクス

    2020.04 - 2022.03

    科学研究費補助金  量子液晶の物性科学

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    Authorship:Principal investigator 

  2. エネルギー地形および非平衡相転移描像を用いた,固体の力学応答に関する統一的理解

    2019.04 - 2022.03

    科学研究費補助金  基盤研究(C)

  3. 変形可能な超粒子分散系におけるパッシブ・アクティブダイナミクスの統一的研究

    2016.04 - 2019.03

    科学研究費補助金  若手研究(A)

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    Authorship:Principal investigator 

  4. Glass/jamming transitions of the out-of-equiilbirum systems

    Grant number:20H00128  2020.04 - 2024.03

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  5. Phase Transition Dynamics of Classical Anisotropic Particle Systems with Liquid Crystal Ordering

    Grant number:20H05157  2020.04 - 2022.03

    Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

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    Authorship:Principal investigator 

    Grant amount:\2990000 ( Direct Cost: \2300000 、 Indirect Cost:\690000 )

  6. エネルギー地形および非平衡相転移描像を用いた,固体の力学応答に関する統一的理解

    Grant number:19K03767  2019.04 - 2022.03

    川崎 猛史

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    Grant amount:\4160000 ( Direct Cost: \3200000 、 Indirect Cost:\960000 )

    結晶やアモルファス等の固体材料は,これらの初期構造の安定性によって,変形に対して急激に壊れる(脆性破壊)または徐々に壊れる(延性破壊)を示すことが経験的に知られている.しかし,これらの物理機構は未解明である.本研究は,コンピュータシミュレーションを用い,熱や変形により固体の初期構造を系統的に変化させ,脆性破壊および脆性破壊が起こる物理機構を解明する.
    物質をある初期温度で構造緩和させ,その後冷却するという過程をアニールとよび,その力学物性はアニール温度によって大きく変化することが知られている.十分アニールした場合,初期温度が低いほど,物質はより安定な構造をとる.一方,この安定性に関する議論は,あらわに構造が特定できないガラスにおいても適用可能であることが知られている.ミクロな側面から多大な知見を与える分子動力学法など従来型の数値計算では,大規模なものであっても構造緩和時間を高々ミリ秒オーダーまでしか計算することが難しいため,実験におけるガラス転移温度に比べ遥かに高温領域までしかアニールすることが出来なかった.これに対して本研研究では,大変効率の良い熱平衡サンプリング法を用いることにより,アニール温度を大きく変化させた,安定性が幅広く異なるガラスに対し,非常にゆっくりな(準静的な)周期剪断を与えた際の力学特性を調べた.
    本年度の成果は以下の通りである.
    (1) 剪断強度を大きくしていくと,高温でアニールしたガラスは,高エネルギー状態から徐々にエネルギーが下がり,降伏が起こるところで最小値を示し,降伏後上昇することを確認した.一方,極低温でアニールしたガラスは,低エネルギーを示す安定状態から始まり,降伏までエネルギーはほぼ一定となった.そして、降伏の際,不連続に増大し,その後は高温でアニールしたサンプルと同様な振る舞いを見せることが分かった.
    (2) 高温でアニールしたサンプルにおける応力歪み曲線は,連続的に振る舞い,一方,極低温でアニールしたサンプルは、降伏で不連続に振る舞うことを確認した.さらに,ここでの不連続な振る舞いは,エネルギーが不連続に増大することと対応していることを明らかにした.
    (3) 降伏の不連続性の有無は,初期状態のエネルギーが降伏時におけるエネルギーの大小関係から一意に決まることを示した.
    サンプルに対するアニールの度合いにより,応力歪み曲線において,脆性破壊的な不連続的振る舞いを見せる場合と,延性破壊的な連続的振る舞いを見せることは近年の先行研究により示されていたが,そのメカニズムは明らかとなっていなかった.本研究では,初期構造のエネルギーと,降伏時におけるエネルギーを比較することにより力学応答が脆性的になるか,あるいは延性的となるかが一意に決まるという極めて明解な結果を得た.本研究結果は,論文として纏められており,最近(2020年6月),Physical Review Lettersから出版されたことからも,十分なインパクトを有すると考えている.
    本年度は,系全体のエネルギー―などマクロな量についての議論を行った.今後は,剪断に伴う構造変化やそれに伴う力学物性の異方性など,よりミクロな観点からこの問題を考察したい.特に,サンプルの構築に関しては,アニールを熱だけでなく,周期剪断の様な機械強化機構(機械的アニールと呼ぶ)に置き換え,これを熱によりアニールされた系と比較することにより,それぞれにおける力学応答の類似点と相違点を明らかにする.

  7. Molecular mechanism of slow dynamics in glass-forming liquids: Transition states and transport phenomena

    Grant number:18H01188  2018.04 - 2022.03

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  8. 非平衡・非一様・非従来型液体のガラス転移の研究

    Grant number:16H04034  2016.04 - 2020.03

    宮崎 州正

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    (1)非平衡ガラス転移について:(a) 昨年度に引き続きアクティブマターの新規モデルの開発とその解析を行った。非マルコフ過程に従うランジュバン方程式では、散逸と揺らぎの二つの緩和時間がある、その両方が等しい場合が平衡系である。一方、揺らぎの緩和時間のみを有限にしたモデルが、最近研究されているアクティブマターである。我々は散逸の緩和時間も系統的に変化させたモデルを考案し、その解析を行った。その結果、その密度が抑えられ、超一様系が存在することが明らかになった。その指数は非整数でありこれまで発見された超一様性のモデルのいずれにも属さないのものである。(b)標準的なアクティブマターの模型であるAOUPモデルのガラス転移の解析を行った。従来にはない大きな「非平衡度」領域を幅広く探索し、その領域での動的不均一性を解析した。我々の解析結果は動的相関などに際立った相違が現れることを示唆している。(c)コロイド系とガラス系のジャミング転移近傍の非線形レオロジーと可逆不可逆転移について解析を行った。ジャミング転移点より低密度領域においてもその動的挙動は極めて多彩であり、粒子軌道は不可逆的になりうる。不可逆軌道の一部は、応力応答として巨視的に観測できることを明らかにした。また急冷したガラス系の応力応答の解析を行い、その非線形レオロジーが急冷速度と振動シアの振幅に大きく依存する事を明らかにした。
    (2)非一様ガラス転移について:ランダムピニング系のガラス相における残留エントロピーとダイナミクスの計算から、metabasin中のダイナミクスが残っており、ランドスケープの階層性に由来する残留エントロピーが有限であることを示した。
    (3)非従来系のガラス転移について:ultrasoft系の解析を行い、ガラス転移線上に起こる動的特異点付近でのStokes-Einstein則の破れを定量的に評価した。
    (1)非平衡ガラス転移について:(a) 新規アクティブマター模型の提案と、新しいタイプの超一様性の発見は予想していなかったことである。超一様性はいくつかの非平衡模型で発見されているが、我々の指数は、それらのいずれとも異なる。さらにこの系は動的に揺らいでいる系であり、これまでの静的なモデルとは本質的な相違がある。その意味で今後研究が発展的に進むことが期待である。しかし今年度の解析はまだ限定的でさらなる系統的な解析が必要である。(b)AOUPモデルのガラス転移の研究の結果は、アクティブガラスの本質的には平衡ガラスと大きく変わらないという先行研究の結論に反するものであり、意義が大きい。しかしその相違の定量的な評価、物理的な起源についての解析は今後の課題である。(c)ガラス系とジャミング系の非線形レオロジーと可逆不可逆転移の問題では、多くの知見と成果が得られた。しかしそれ以上に、多くの課題が浮上し、この問題の奥の深さと今後の発展の可能性が明らかになった。その課題を顕在させたことが最大の成果かもしれない。
    (2)非一様ガラス転移について:プロジェクトとしては終盤となり解析と論文出版を行った。課題は多く残されているものの高い評価を得られる結果となった。
    (3)非従来系のガラス転移について:従来の典型的な系では見られないガラス転移の挙動、とくに大きなStokes-Einstein則の破れが成果である。この系の特異ダイナミクスはほぼ解析し尽くしたが、背後にあるであろう液体のポリアモルフィズムについては、今後の課題として残された。
    H31年度は、研究の三つの柱のうち、(1) 非平衡系のガラス転移を数値的解析を中心に、研究を実施する。(a)アクティブマター系で、既に我々が明らかにした、超一様性を示すパラメータ領域のダイナミクスも解析を開始する。(b) アクティブマターのガラス転移においては、今年度は解析をさらに進める。特に、動的不均一性に注目し、システムサイズ依存性、質量依存性(ダイナミクス依存性)を詳細に解析し、ボンド相関長などを通した特徴的な長さの抽出を目指す。これにより非平衡系特有の揺らぎのガラス転移における本質を抽出する。(c) ガラス系、ジャミング系の可逆不可逆転移と非線形レオロジーの解析をさらに進める。これまでほとんど手続かずであったジャミング点の直近、臨界領域を開拓する。このジャミング転移点は、ジャミングをする前の母体となる液体の構造に敏感に依存する。つまり圧力を急上昇させる前のアニールを充分に行うとより高密度のジャミング状態が得られる。そのクロスオーバはMCT転移点に支配されている。我々は、液体をMCT転移点以下で系統的にアニールさせ、ジャミング転移点近傍の不可逆転移とレオロジーを詳細に解析する。これにより、ジャミング転移点以下でも、シアにより誘引されるシアジャミング現象や、線形応答領域(弾性領域)と流動領域(降伏領域)の中間相である非線形応答領域に探索を行う。これらの解析は、可逆不可逆転移、降伏転移、ジャミング転移、ガラス転移、そして新しいガラス転移相として脚光を浴びているガードナー転移を統一的に理解する試みである。

  9. Non-Gaussian fluctuation and rheology in jammed matter

    Grant number:16H04025  2016.04 - 2020.03

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  10. Passive and active dynamics in soft deformable particles

    Grant number:16H06018  2016.04 - 2019.03

    Takeshi Kawasaki

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    Grant amount:\9230000 ( Direct Cost: \7100000 、 Indirect Cost:\2130000 )

    In this study, we use soft model particles to investigate the "passive system," which is driven by thermal fluctuations or external forces such as emulsions and colloids, and "active system" such as cells and biological species which are self-driven systems. The purpose of this study was to clarify the flow characteristics and vibration properties of high-density passive and active particle systems. As a result, we clarify that the softness of the particles is related to the origin of the complex nonlinear flow phenomenon in the passive system. Besides, we find a new type of non-equilibrium phase transition by using soft particles under periodic shear. In the active system, we develop a new method to extract the vibrational properties of solids by using the linear response between the softness of the particles and the self-driving force.

  11. 変形の効果を考慮した粒子の分散系における流動特性

    2015.08 - 2016.03

    科学研究費補助金 

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Teaching Experience (On-campus) 9

  1. Fundamentals of Physics I

    2020

  2. Physics Tutorial IV

    2020

  3. Applied Physics Tutorial IV a

    2020

  4. Physics Tutorial 4 (for Statistical Phsiycs 3)

    2016

  5. 物性生物物理学特別講義 (オムニバス講義 1回分)

    2016

  6. 統計物理学演習IV

    2016

  7. 物性生物物理学特別講義 (オムニバス講義 1回分)

    2015

  8. 統計物理学演習IV

    2015

  9. Physics Tutorial 4 (for Statistical Phsiycs 3)

    2015

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Teaching Experience (Off-campus) 1

  1. Physics Tutorial 4 (for Statistical Phsiycs 3)

    Nagoya University)

 

Social Contribution 5

  1. 新聞掲載:「第13回凝縮系科学賞受賞式 実験部門:水口氏 理論部門:川﨑氏」

    Informant

    科学新聞社  2018.12.21

  2. 市民講演 あいちサイエンスフェスティバル 「過冷却液体の不思議」

    Appearance, Lecturer

    豊橋地下資源館  名古屋大学出前授業 2018 in 豊橋  2018.11.23

  3. 新聞掲載「過冷却水がドロドロの高粘度になる原因を解明」

    Informant

    科学新聞社  科学新聞 2面  2017.8.25

  4. JST さくらサイエンスプラン・南京大学・学部生招聘プログラム

    Presenter, Lecturer

    2017.3

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    Audience: College students

    Type:University open house

  5. JST さくらサイエンスプラン・南京大学・学部生招聘プログラム

    Presenter, Lecturer

    2017.3

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    Audience: College students

    Type:University open house

Media Coverage 2

  1. 新聞掲載「科学への関心高めた2カ月 あいちサイエンスフェス/名大出前授業豊橋できょう「最終講義」マントルや温度による物質の変化に興味津々 Newspaper, magazine

    東日新聞社  東日新聞  2018.11.25

  2. 新聞掲載「氷点下でも凍らない水 どろどろの仕組み解明 阪大・名大」 Newspaper, magazine

    日本経済新聞社  日本経済新聞(朝刊・科学欄)  2017.10.15