Zobrazeno 1 - 10
of 109
pro vyhledávání: '"Koichiro Yaji"'
Autor:
Koichiro Yaji, Yuya Hattori, Shunsuke Yoshizawa, Shunsuke Tsuda, Fumio Komori, Youhei Yamaji, Yuto Fukushima, Kaishu Kawaguchi, Takeshi Kondo, Yuki Tokumoto, Keiichi Edagawa, Taichi Terashima
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-8 (2024)
Abstract The formation of the topological surface state originates from bulk band inversion at the top of the valence band and the bottom of the conduction band. The transition between normal and topological insulators is known as a topological phase
Externí odkaz:
https://doaj.org/article/2084509eabff4aafba31cb7922a46af8
Autor:
Tomonori Nakamura, Yitao Chen, Ryohei Nemoto, Wenxuan Qian, Yuto Fukushima, Kaishu Kawaguchi, Ryo Mori, Takeshi Kondo, Youhei Yamaji, Shunsuke Tsuda, Koichiro Yaji, Takashi Uchihashi
Publikováno v:
Communications Materials, Vol 5, Iss 1, Pp 1-9 (2024)
Abstract Moiré superlattices consisting of two-dimensional materials have attracted immense attention because of emergent phenomena such as flat band-induced Mott insulating states and unconventional superconductivity. However, the effects of spin-o
Externí odkaz:
https://doaj.org/article/92e212eac4c54bef979a4eb9a2d848fa
Autor:
Koichiro Yaji, Shunsuke Tsuda
Publikováno v:
Science and Technology of Advanced Materials: Methods, Vol 4, Iss 1 (2024)
ABSTRACTHarnessing electron spin is crucial in developing energy-saving and high-speed devices for the next generation. In this scheme, visualizing spin-polarized electronic states aids in designing and developing new materials and devices. Spin-reso
Externí odkaz:
https://doaj.org/article/9e6d78b07e6346daa608e638d1f1fa02
Autor:
Shunsuke Yoshizawa, Takahiro Kobayashi, Yoshitaka Nakata, Koichiro Yaji, Kenta Yokota, Fumio Komori, Shik Shin, Kazuyuki Sakamoto, Takashi Uchihashi
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)
The effect of Rashba spin orbit coupling (SOC) on superconductivity remains elusive. Here, the authors report largely enhanced in-plane upper critical magnetic field due to Rashba SOC induced dynamic spin-momentum locking on the surfaces of an atomic
Externí odkaz:
https://doaj.org/article/21d300293e1045a9865edb502d0f8352
Autor:
Peng Zhang, Ryo Noguchi, Kenta Kuroda, Chun Lin, Kaishu Kawaguchi, Koichiro Yaji, Ayumi Harasawa, Mikk Lippmaa, Simin Nie, Hongming Weng, V. Kandyba, A. Giampietri, A. Barinov, Qiang Li, G. D. Gu, Shik Shin, Takeshi Kondo
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-7 (2021)
Topological side surface, characterization of a weak topological insulator (WTI), has rarely been investigated. Here, Zhang et al. visualize a quasi-one dimensional, spin-momentum locked band on the side surface of the WTI candidate ZrTe5, and manipu
Externí odkaz:
https://doaj.org/article/1d0a56307963451c84a4a924c64a74a2
Autor:
Koichiro Yaji, Kenta Kuroda, Sogen Toyohisa, Ayumi Harasawa, Yukiaki Ishida, Shuntaro Watanabe, Chuangtian Chen, Katsuyoshi Kobayashi, Fumio Komori, Shik Shin
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-6 (2017)
Spin–orbit coupling produces spin–orbital-entanglement in quasiparticle eigenstates. Here, Yajiet al. present a general description of spin–orbital-entangled states and establish a model for dipole transition based on spin-dependent quantum int
Externí odkaz:
https://doaj.org/article/370824940f794884a00be2e32f66a3e6
Autor:
Juraj Krempaský, Mauro Fanciulli, Laurent Nicolaï, Jan Minár, Henrieta Volfová, Ondřej Caha, Valentine V. Volobuev, Jaime Sánchez-Barriga, Martin Gmitra, Koichiro Yaji, Kenta Kuroda, Shik Shin, Fumio Komori, Gunther Springholz, J. Hugo Dil
Publikováno v:
Physical Review Research, Vol 2, Iss 1, p 013107 (2020)
By measuring the spin polarization of GeTe films as a function of light polarization we observed that the bulk states are fully spin polarized in the initial state, in strong contrast with observations for other systems with a strong spin-orbit inter
Externí odkaz:
https://doaj.org/article/b705311f24e24488a736fc52ec527d57
Autor:
Wei-Chuan Chen, Tay-Rong Chang, Sun-Ting Tsai, Sh Yamamoto, Je-Ming Kuo, Cheng-Maw Cheng, Ku-Ding Tsuei, Koichiro Yaji, Hsin Lin, H-T Jeng, Chung-Yu Mou, Iwao Matsuda, S-J Tang
Publikováno v:
New Journal of Physics, Vol 17, Iss 9, p 099502 (2015)
Externí odkaz:
https://doaj.org/article/d7033790ba8147ef8bedfa206751129a
Autor:
Wei-Chuan Chen, Tay-Rong Chang, Sun-Ting Tsai, S Yamamoto, Je-Ming Kuo, Cheng-Maw Cheng, Ku-Ding Tsuei, Koichiro Yaji, Hsin Lin, H-T Jeng, Chung-Yu Mou, Iwao Matsuda, S-J Tang
Publikováno v:
New Journal of Physics, Vol 17, Iss 8, p 083015 (2015)
Dirac cones in a two-dimensional environment have attracted much attention not only because of the massless Dirac fermions but also due to their capability to lock the spin direction with the momentum. Here we demonstrate that the Rashba effect withi
Externí odkaz:
https://doaj.org/article/f2c6db3a21b344938e3c7d5b682e12c9
Autor:
Rena Moue, Hiroto Yamazaki, Tatsuya Kitazawa, Koichiro Yaji, Hiroshi Yaguchi, Kenta Kuroda, Takeshi Kondo, Ayumi Harasawa, Takashi Iwahashi, Yukio Ouchi, Shik Shin, Kaname Kanai
Publikováno v:
ChemNanoMat. 9
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c4caf1eb735e592764a378f37424aa6
https://doi.org/10.1002/cnma.202200538
https://doi.org/10.1002/cnma.202200538