Updated on 2026/04/14

写真a

 
WANG Jia
 
Organization
Institute for Advanced Research Designated Assistant Professor
Institute of Materials and Systems for Sustainability Designated Assistant Professor
Title
Designated Assistant Professor
Contact information
メールアドレス
External link

Degree 1

  1. Doctor of Philosophy ( 2021.9   University of California, Los Angeles ) 

Research Areas 1

  1. Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electric/electronic material engineering  / semiconductor physics

Education 1

  1. University of California, Los Angeles   Graduate School of Engineering   Materials Science and Engineering

    2016.9 - 2021.9

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    Country: United States

Awards 1

  1. 赤崎賞

    2025.3   国立大学法人東海国立大学機構  

    王嘉

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    Award type:International academic award (Japan or overseas) 

 

Papers 25

  1. Observation of 2D-magnesium-intercalated gallium nitride superlattices Reviewed Open Access

    Jia Wang, Wentao Cai, Weifang Lu, Shun Lu, Emi Kano, Verdad C. Agulto, Biplab Sarkar, Hirotaka Watanabe, Nobuyuki Ikarashi, Toshiyuki Iwamoto, Makoto Nakajima, Yoshio Honda, Hiroshi Amano

    Nature   Vol. 631 ( 8019 ) page: 67 - 72   2024.6

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    Abstract

    Since the demonstration of p-type gallium nitride (GaN) through doping with substitutional magnesium (Mg) atoms<sup>1,2</sup>, rapid and comprehensive developments, such as blue light-emitting diodes, have considerably shaped our modern lives and contributed to a more carbon-neutral society<sup>3–5</sup>. However, the details of the interplay between GaN and Mg have remained largely unknown<sup>6–11</sup>. Here we observe that Mg-intercalated GaN superlattices can form spontaneously by annealing a metallic Mg film on GaN at atmospheric pressure. To our knowledge, this marks the first instance of a two-dimensional metal intercalated into a bulk semiconductor, with each Mg monolayer being intricately inserted between several monolayers of hexagonal GaN. Characterized as an interstitial intercalation, this process induces substantial uniaxial compressive strain perpendicular to the interstitial layers. Consequently, the GaN layers in the Mg-intercalated GaN superlattices exhibit an exceptional elastic strain exceeding −10% (equivalent to a stress of more than 20 GPa), among the highest recorded for thin-film materials<sup>12</sup>. The strain alters the electronic band structure and greatly enhances hole transport along the compression direction. Furthermore, the Mg sheets induce a unique periodic transition in GaN polarity, generating polarization-field-induced net charges. These characteristics offer fresh insights into semiconductor doping and conductivity enhancement, as well as into elastic strain engineering of nanomaterials and metal–semiconductor superlattices<sup>13</sup>.

    DOI: 10.1038/s41586-024-07513-x

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    Other Link: https://www.nature.com/articles/s41586-024-07513-x

  2. Study of beryllium acceptor states in aluminum nitride via cathodoluminescence analysis Reviewed Open Access

    Yingying Lin, Jia Wang, Wentao Cai, Haitao Wang, Maki Kushimoto, Yoshio Honda, Hiroshi Amano

    Applied Physics Letters   Vol. 128 ( 3 )   2026.1

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

    DOI: https://doi.org/10.1063/5.0301493

    Open Access

    Other Link: https://pubs.aip.org/aip/apl/article/128/3/032106/3377876

  3. Unveiling the physics of excellent ohmic contact in Mg-intercalated p-GaN Reviewed International coauthorship Open Access

    Haitao Wang, Jia Wang, Yingying Lin, Hei Wong, Hiroshi Amano

    Materials Today Physics   Vol. 62 ( 102062 )   2026.3

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

    DOI: doi.org/10.1016/j.mtphys.2026.102062

    Open Access

  4. Red emission from InGaN active layer grown on nanoscale InGaN pseudosubstrates Invited Reviewed

    Wentao Cai, Jia Wang, Jeong-Hwan Park, Yuta Furusawa, Heajeong Cheong, Shugo Nitta, Yoshio Honda, Markus Pristovsek, Hiroshi Amano

    Japanese Journal of Applied Physics   Vol. 62 ( 2 ) page: 020902-1 - 020902-5   2023.2

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

    DOI: 10.35848/1347-4065/acb74c

    Other Link: https://iopscience.iop.org/article/10.35848/1347-4065/acb74c

  5. Ohmic Contact to p-Type GaN Enabled by Post-Growth Diffusion of Magnesium Reviewed Open Access

    Jia Wang, Shun Lu, Wentao Cai, Takeru Kumabe, Yuto Ando, Yaqiang Liao, Yoshio Honda, Ya-Hong Xie

    IEEE Electron Device Letters   Vol. 43 ( 1 ) page: 150 - 153   2021.11

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

    DOI: 10.1109/LED.2021.3131057

    Open Access

  6. High-Gain Gated Lateral Power Bipolar Junction Transistor Reviewed Open Access

    Jia Wang, Ya-Hong Xie, and Hiroshi Amano

    IEEE Electron Device Letters   Vol. 42 ( 9 ) page: 1370 - 1373   2021.7

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

    DOI: 10.1109/LED.2021.3099982

    Other Link: https://ieeexplore.ieee.org/document/9495819

  7. Non-polar True-lateral GaN Power Diodes on Foreign Substrates Reviewed Open Access

    Jia Wang, Guo Yu, Hua Zong, Yaqiang Liao, Weifang Lu, Wentao Cai, Xiaodong Hu, Ya-Hong Xie, and Hiroshi Amano

    Applied Physics Letters   Vol. 118 ( 21 )   2021.5

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

    DOI: https://doi.org/10.1063/5.0051552

    Open Access

    Other Link: https://pubs.aip.org/aip/apl/article/118/21/212102/40020/Non-polar-true-lateral-GaN-power-diodes-on-foreign

  8. A Schottky gate p-GaN fin-channel field effect transistor on very low-doped p-GaN films Open Access

    Fregolent M., Singh S., Lu S., Watanabe H., Wang J., De Santi C., Meneghesso G., Zanoni E., Meneghini M., Honda Y., Amano H., Sarkar B.

    Japanese Journal of Applied Physics Part 1 Regular Papers and Short Notes and Review Papers   Vol. 64 ( 12 )   2025.12

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    Publisher:Japanese Journal of Applied Physics Part 1 Regular Papers and Short Notes and Review Papers  

    In this paper, we report a trigate fin-channel FET on very low-doped p-GaN films. While achieving a good source/drain ohmic contact mandates high p-GaN doping; a good Schottky gate interface, in contrast, demands low doping. We show that selective thermal diffusion of Mg is effective in enabling a good source/drain ohmic contact, whereas a low-doped p-GaN film enables good Schottky contact formation. The reported p-GaN FET showed an ON-resistance of ∼43 kΩ.mm and an I <inf>on</inf>/I<inf>off</inf> ratio of ∼10<sup>6</sup>

    DOI: 10.35848/1347-4065/ae23d6

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  9. (Ultra)wide bandgap semiconductor heterostructures for electronics cooling

    Zhe Cheng, Zifeng Huang, Jinchi Sun, Jia Wang, Tianli Feng, Kazuki Ohnishi, Jianbo Liang, Hiroshi Amano, Ru Huang

    Applied Physics Reviews   Vol. 11 ( 4 )   2024.12

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/5.0185305

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  10. Fabrication of a freestanding AlN substrate via HVPE homoepitaxy on a PVT-AlN substrate Open Access

    Liu Ting, Qian Zhang, Xu Li, Minghao Chen, Chunhua Du, Maosong Sun, Jia Wang, Shuxin Tan, Jicai Zhang

    Semiconductor Science and Technology   Vol. 39 ( 1 )   2023.12

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    Publishing type:Research paper (scientific journal)  

    <jats:title>Abstract</jats:title>
    <jats:p>Hydride vapor phase epitaxy (HVPE) is employed for the homoepitaxial development of AlN thick films on AlN substrates grown via physical vapor transport (PVT). A freestanding AlN substrate with a 200 <jats:italic>μ</jats:italic>m thickness is then obtained by mechanically grinding away the PVT-AlN substrate. The as-grown HVPE AlN layer has a smooth surface with long parallel atomic steps. The freestanding HVPE-AlN substrate is crack-free and stress-free. In comparison to PVT-AlN substrate, HVPE-AlN substrate not only has better crystal quality but also substantially lower C, O, and Si impurity concentrations. The deep ultraviolet (DUV) transmittance of the 200 <jats:italic>μ</jats:italic>m thick freestanding AlN substrate is as high as 66% at 265 nm. This performance aligns perfectly with the demands of AlGaN-based DUV optoelectronic devices.</jats:p>

    DOI: 10.1088/1361-6641/ad12df

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  11. Impact of graphene state on the orientation of III–nitride Reviewed

    Jeong-Hwan Park, Nan Hu, Mun-Do Park, Jia Wang, Xu Yang, Dong-Seon Lee, Hiroshi Amano, Markus Pristovsek

    Applied Physics Letters   Vol. 123 ( 12 )   2023.9

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

    DOI: https://doi.org/10.1063/5.0157588

    Other Link: https://pubs.aip.org/aip/apl/article/123/12/121601/2911583

  12. Lateral p-type GaN Schottky barrier diode with annealed Mg ohmic contact layer demonstrating ideal current–voltage characteristic Reviewed

    Shun Lu, Manato Deki, Takeru Kumabe, Jia Wang, Kazuki Ohnishi, Hirotaka Watanabe, Shugo Nitta, Yoshio Honda, Hiroshi Amano

    Applied Physics Letters   Vol. 122 ( 14 )   2023.4

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

    DOI: https://doi.org/10.1063/5.0146080

    Other Link: https://pubs.aip.org/aip/apl/article/122/14/142106/2882366

  13. Red emission from InGaN active layer grown on nanoscale InGaN pseudosubstrates Reviewed

    Wentao Cai, Jia Wang, Jeong-Hwan Park, Yuta Furusawa, Heajeong Cheong, Shugo Nitta, Yoshio Honda, Markus Pristovsek, Hiroshi Amano

    Japanese Journal of Applied Physics   Vol. 62 ( 2 )   2023.2

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

    DOI: 10.35848/1347-4065/acb74c

    Other Link: https://iopscience.iop.org/article/10.35848/1347-4065/acb74c

  14. High In content nitride sub-micrometer platelet arrays for long wavelength optical applications Reviewed

    Wentao Cai, Yuta Furusawa, Jia Wang, Jeong-Hwan Park, Yaqiang Liao, Hea-Jeong Cheong, Shugo Nitta, Yoshio Honda, Markus Pristovsek, Hiroshi Amano

    Applied Physics Letters   Vol. 121 ( 21 )   2022.11

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

    DOI: https://doi.org/10.1063/5.0120723

    Other Link: https://pubs.aip.org/aip/apl/article/121/21/211105/2834502/High-In-content-nitride-sub-micrometer-platelet

  15. High In content nitride sub-micrometer platelet arrays for long wavelength optical applications

    Wentao Cai, Yuta Furusawa, Jia Wang, Jeong-Hwan Park, Yaqiang Liao, Hea-Jeong Cheong, Shugo Nitta, Yoshio Honda, Markus Pristovsek, Hiroshi Amano

    Applied Physics Letters   Vol. 121 ( 21 )   2022.11

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    DOI: 10.1063/5.0120723

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  16. Improved device performance of vertical GaN-on-GaN nanorod Schottky barrier diodes with wet-etching process Reviewed International coauthorship Open Access

    Yaqiang Liao, Tao Chen, Jia Wang, Yuto Ando, Wentao Cai, Xu Yang, Hirotaka Watanabe, Jun Hirotani, Atsushi Tanaka, Shugo Nitta, Yoshio Honda, Kevin Jing Chen, Hiroshi Amano

    Applied Physics Letters   Vol. 120 ( 12 )   2022.3

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

    DOI: https://doi.org/10.1063/5.0083194

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    Other Link: https://pubs.aip.org/aip/apl/article/120/12/122109/2833272

  17. Ohmic contact on low-doping-density p-type GaN with nitrogen-annealed Mg Reviewed Open Access

    Shun Lu, Manato Deki, Jia Wang, Kazuki Ohnishi, Yuto Ando, Takeru Kumabe, Hirotaka Watanabe, Shugo Nitta, Yoshio Honda, Hiroshi Amano

    Applied Physics Letters   Vol. 119 ( 24 )   2021.12

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  18. Vertical GaN-on-GaN nanowire Schottky barrier diodes by top-down fabrication approach Reviewed

    Yaqiang Liao, Tao Chen, Jia Wang, Yuto Ando, Wentao Cai, Xu Yang, Hirotaka Watanabe, Jun Hirotani, Atsushi Tanaka, Shugo Nitta, Yoshio Honda, Kevin Jing Chen, Hiroshi Amano

    Japanese Journal of Applied Physics   Vol. 60   page: 070903   2021.6

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

    DOI: 10.35848/1347-4065/ac06b5

    Other Link: https://iopscience.iop.org/article/10.35848/1347-4065/ac06b5/meta

  19. Suppression of the regrowth interface leakage current in AlGaN/GaN HEMTs by unactivated Mg doped GaN layer Reviewed Open Access

    Ting Liu, Hirotaka Watanabe, Shugo Nitta, Jia Wang , Guohao Yu, Yuto Ando, Yoshio Honda, Hiroshi Amano, Atsushi Tanaka, Yasuo Koide

    Applied Physics Letters   Vol. 118 ( 7 )   2021.2

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  20. Insight into the Ga/In flux ratio and crystallographic plane dependence of MBE self-assembled growth of InGaN nanorods on patterned sapphire substrates Reviewed International journal

    Jian Shen, Yuefeng Yu, Jia Wang, Yulin Zheng, Yang Gan, and Guoqiang Li

    Nanoscale   Vol. 12 ( 6 ) page: 4018 - 4029   2020.1

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

    DOI: 10.1039/C9NR09767H

    Other Link: https://pubs.acs.org/doi/full/10.1021/acsami.6b07044#

  21. Effect of Mn addition on the precipitation and corrosion behaviour of 22% Cr economical duplex stainless steel after isothermal aging at 800° C Reviewed

    Zaiqiang Feng, Yinhui Yang, Jia Wang

    Journal of Alloys and Compounds   Vol. 699   page: 334 - 344   2017.3

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

    DOI: doi.org/10.1016/j.jallcom.2017.01.031

    Other Link: https://www.sciencedirect.com/science/article/pii/S0925838817300427

  22. Dislocation Reduction and Stress Relaxation of GaN and InGaN Multiple Quantum Wells with Improved Performance via Serpentine Channel Patterned Mask Reviewed Open Access

    Qingbin Ji, Lei Li, Wei Zhang, Jia Wang , Peichi Liu, Yahong Xie, Tongxing Yan, Wei Yang, Weihua. Chen, Xiaodong Hu

    ACS Applied Materials & Interfaces   Vol. 8 ( 33 ) page: 21480 - 21489   2016.8

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

    DOI: doi.org/10.1021/acsami.6b07044

    Other Link: https://pubs.acs.org/doi/full/10.1021/acsami.6b07044#

  23. Effects of rapid thermal annealing on the properties of AlN films deposited by PEALD on AlGaN/GaN heterostructures Reviewed Open Access

    Duo Cao, Xinhong Cheng, Ya-Hong Xie, Li Zheng, Zhongjian Wang, Xinke Yu, Jia Wang, Dashen Shen, and Yuehui Yu

    RSC Advances   Vol. 5 ( 47 ) page: 37881 - 37886   2015.4

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

    DOI: 10.1039/C5RA04728E

    Other Link: https://pubs.rsc.org/en/content/articlehtml/2015/ra/c5ra04728e

  24. The influence of solution treatment temperature on microstructure and corrosion behavior of high temperature ageing in 25% Cr duplex stainless steel Reviewed

    Yinhui Yang, Biao Yan, Jia Wang, Junlin Yin

    Journal of Alloys and Compounds   Vol. 509 ( 36 ) page: 8870 - 8879   2011.9

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

    DOI: https://doi.org/10.1016/j.jallcom.2011.06.099

    Other Link: https://www.sciencedirect.com/science/article/pii/S0925838811014125

  25. The effect of large heat input on the microstructure and corrosion behaviour of simulated heat affected zone in 2205 duplex stainless steel Reviewed

    Yinhui Yang, Biao Yan, Jie Li, Jia Wang

    Corrosion Science   Vol. 53 ( 11 ) page: 3756 - 3763   2011.7

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

    DOI: https://doi.org/10.1016/j.corsci.2011.07.022

    Other Link: https://www.sciencedirect.com/science/article/pii/S0010938X11003891

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Presentations 2

  1. 3D GaN Power Switching Electronics: A Revival of Interest in ELO Invited International conference

    Jia Wang, Hiroshi Amano, Ya-Hong Xie

    2021 5th IEEE Electron Devices Technology & Manufacturing Conference (EDTM)  2021.4  IEEE

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    Event date: 2021.4

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

    Venue:Chengdu, China  

    DOI: 10.1109/EDTM50988.2021.9420859

    Other Link: https://ieeexplore.ieee.org/document/9420859

  2. Annealing of Mg Nanodot Arrays on GaN for p-type Ohmic Contact International conference

    Jia Wang, Wentao Cai, Shun Lu, Yoshio Honda, Hiroshi Amano

    2022 International Workshop of Nitride Semiconductors (IWN)  2022.10 

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    Event date: 2022.10

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Berlin, Germany