Faculty Profiles - TANAKA, Yukio

We investigate the energy dispersion of the edge states in zigzag silicene, germanene and stanene nanoribbons with and without hydrogen termination based on a multi-orbital tight-binding model. Since the low buckled structures are crucial for these materials, both the π and σ orbitals have a strong influence on the edge states, different from the case for graphene nanoribbons. The obtained dispersion of helical edge states is nonlinear, similar to that obtained by first-principles calculations. On the other hand, the dispersion derived from the single-orbital tight-binding model is always linear. Therefore, we find that the non-linearity comes from the multi-orbital effects, and accurate results cannot be obtained by the single-orbital model but can be obtained by the multi-orbital tight-binding model. We show that the multi-orbital model is essential for correctly understanding the dispersion of the edge states in tetragen nanoribbons with a low buckled geometry.

DOI： 10.1088/1361-648X/aa57e0

Web of Science

PubMed

Theory of surface Andreev bound states and tunneling spectroscopy in three-dimensional chiral superconductors Reviewed

Shun Tamura, Shingo Kobayashi, Lu Bo, and Yukio Tanaka

Physical Review B Vol. 95 page： 104511 2017.3

Anisotropic Magnetic Responses of Topological Crystalline Superconductors Reviewed

Yuansen Xiong , Ai Yamakage, Shingo Kobayashi, Masatoshi Sato and Yukio Tanaka

Crystals Vol. 7 page： 58 2017.2

Generalized parafermions and nonlocal Josephson effect in multilayer systems Invited Reviewed

Hiromi Ebisu, Eran Sagi, Yukio Tanaka, and Yuval Oreg

Physical Review B Vol. 95 page： 075111 2017.2

Generalized parafermions and nonlocal Josephson effect in multilayer systems

Ebisu, H; Sagi, E; Tanaka, Y; Oreg, Y

PHYSICAL REVIEW B Vol. 95 ( 7 ) 2017.2

Pairing Mechanism of Unconventional Superconductivity in Doped Kane-Mele Mode Reviewed

Yuri Fukaya, Keiji Yada, Ayami Hattori, Yukio Tanaka

Journal of the Physical Society of Japan Vol. 85 ( 10 ) page： 10704 2016.9

Quantization of conductance minimum and index theorem Reviewed

Satoshi Ikegaya, Shu-Ichiro Suzuki, Yukio Tanaka, and Yasuhiro Asano

Vol. 94 page： 054512 2016.8

Theory of time-reversal topological superconductivity in double Rashba wires: symmetries of Cooper pairs and Andreev bound states Reviewed

Hiromi Ebisu, Bo Lu, Jelena Klinovaja, and Yukio Tanaka

Progress of Theoretical and Experimental Physics page： 083I01 2016.8

Superconductivity in doped Dirac semimetals

Tatsuki Hashimoto, Shingo Kobayashi, Yukio Tanaka, and Masatoshi Sato

Physical Review B Vol. 94 2016.7

Influence of the impurity scattering on charge transport in unconventional superconductor junctions

Bo Lu, Pablo Burset, Yasunari Tanuma, Alexander A. Golubov, Yasuhiro Asano, and Yukio Tanaka

Physical Review B Vol. 94 page： 014504 2016.7

Tunneling and Josephson effects in odd-frequency superconductor junctions: A study on multichannel Kondo chain

Shintaro Hoshino, Keiji Yada, and Yukio Tanaka

Physical Review B Vol. 93 page： 224511 2016.6

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Papers - TANAKA, Yukio