Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Kohtaro Yamakawa"'
Autor:
Qi Sheng, Tatsuya Kaneko, Kohtaro Yamakawa, Zurab Guguchia, Zizhou Gong, Guoqiang Zhao, Guangyang Dai, Changqing Jin, Shengli Guo, Licheng Fu, Yilun Gu, Fanlong Ning, Yipeng Cai, Kenji M. Kojima, James Beare, Graeme M. Luke, Shigeki Miyasaka, Masato Matsuura, Shin-ichi Shamoto, Takashi Ito, Wataru Higemoto, Andrea Gauzzi, Yannik Klein, Yasutomo J. Uemura
Publikováno v:
Physical Review Research, Vol 4, Iss 3, p 033172 (2022)
A pyrite system NiS_{2−x}Se_{x} exhibits a bandwidth controlled Mott transition via (S,Se) substitutions in a two-step process: the antiferromagnetic insulator (AFI) to antiferromagnetic metal (AFM) transition at x∼0.45 followed by the AFM to par
Externí odkaz:
https://doaj.org/article/3ae7941a33e640fdbeb38f97ca85df0b
Autor:
Kohei Matsuura, Masaki Roppongi, Mingwei Qiu, Qi Sheng, Yipeng Cai, Kohtaro Yamakawa, Zurab Guguchia, Ryan P. Day, Kenji M. Kojima, Andrea Damascelli, Yuichi Sugimura, Mikihiko Saito, Takaaki Takenaka, Kota Ishihara, Yuta Mizukami, Kenichiro Hashimoto, Yilun Gu, Shengli Guo, Licheng Fu, Zheneng Zhang, Fanlong Ning, Guoqiang Zhao, Guangyang Dai, Changqing Jin, James W. Beare, Graeme M. Luke, Yasutomo J. Uemura, Takasada Shibauchi
Iron-chalcogenide superconductors FeSe$_{1-x}$S$_x$ possess unique electronic properties such as non-magnetic nematic order and its quantum critical point. The nature of superconductivity with such nematicity is important for understanding the mechan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f1938e437d993bc6538bf74c6cb94a21
http://arxiv.org/abs/2304.03409
http://arxiv.org/abs/2304.03409
Autor:
Kohei Matsuura, Masaki Roppongi, Mingwei Qiu, Qi Sheng, Yipeng Cai, Kohtaro Yamakawa, Guguchia, Zurab, Day, Ryan P., Kojima, Kenji M., Damascelli, Andrea, Yuichi Sugimura, Mikihiko Saito, Takaaki Takenaka, Kota Ishihara, Yuta Mizukami, Kenichiro Hashimoto, Yilun Gu, Shengli Guo, Licheng Fu, Zheneng Zhang
Publikováno v:
Proceedings of the National Academy of Sciences of the United States of America; 5/23/2023, Vol. 120 Issue 21, p1-6, 13p
Autor:
Licheng Fu, M. Matsuda, Yilun Gu, K. M. Kojima, Tao Hong, Chris Leighton, John W. Freeland, Jiawei Zang, Martin Greven, S. El-Khatib, Q. Sheng, Travis Williams, Fanlong Ning, Biqiong Yu, Y. Cai, Yasutomo J. Uemura, Karl Olson, Sajna Hameed, Chiming Jin, Kohtaro Yamakawa, G. Q. Zhao
Publikováno v:
Physical Review B. 104
A rare ferromagnet-antiferromagnet transition is known to exist in the solid-solution Y${}_{1\ensuremath{-}x}$La${}_{x}$TiO${}_{3}$ at $x$ \ensuremath{\approx} 0.3. Here, the authors study this transition using a unique battery of techniques, includi
Autor:
Changqing Jin, Cui Ding, F. L. Ning, Zurab Guguchia, Kai Wang, Sky C. Cheung, Huiyuan Man, Kohtaro Yamakawa, Yao Zhao, Hangdong Wang, Benjamin A. Frandsen, Guoxiang Zhi, Yasutomo J. Uemura, Bin Chen, Shengli Guo, Yilun Gu, Licheng Fu, Zhiting Deng
Publikováno v:
Physical Review B. 99
We report the successful synthesis of a 122 diluted ferromagnetic semiconductor with $n$-type carriers, $\mathrm{Ba}{(\mathrm{Zn},\mathrm{Co})}_{2}{\mathrm{As}}_{2}$. Magnetization measurements show that the ferromagnetic transition occurs up to ${T}
Probing the quantum phase transition in Mott insulator BaCoS 2 tuned by pressure and Ni substitution
Autor:
Murray Wilson, Q. Sheng, S. Shamoto, D. Santos-Cottin, Y. Klein, J. Beare, Graeme Luke, Zurab Guguchia, A. Gauzzi, R. De Renzi, Rustem Khasanov, Yasutomo J. Uemura, Benjamin A. Frandsen, Sky C. Cheung, Kohtaro Yamakawa, Alannah Hallas, Zizhou Gong, Yipeng Cai
Publikováno v:
Physical Review Materials
Physical Review Materials, American Physical Society, 2019, 3 (4), pp.045001 (2019). ⟨10.1103/PhysRevMaterials.3.045001⟩
Physical Review Materials, 2019, 3 (4), pp.045001 (2019). ⟨10.1103/PhysRevMaterials.3.045001⟩
Physical Review Materials, American Physical Society, 2019, 3 (4), pp.045001 (2019). ⟨10.1103/PhysRevMaterials.3.045001⟩
Physical Review Materials, 2019, 3 (4), pp.045001 (2019). ⟨10.1103/PhysRevMaterials.3.045001⟩
We present a muon spin relaxation study of the Mott transition in BaCoS_2 using two independent control parameters: (i) pressure p to tune the electronic bandwidth and (ii) Ni-substitution x on the Co site to tune the band filling. For both tuning pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::22d3164f98a80094b94aeafd61680b0b
https://hal.sorbonne-universite.fr/hal-02108326/file/1901.07802.pdf
https://hal.sorbonne-universite.fr/hal-02108326/file/1901.07802.pdf
We study spinful non-interacting electrons moving in two-dimensional materials which exhibit a spectral gap about the Fermi energy as well as time-reversal invariance. Using Fredholm theory we revisit the (known) bulk topological invariant, define a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::17e5c104da733dd3ed28a7c0533b4245
Autor:
Zizhou Gong, Murray Wilson, Pietro Bonfà, Yu Song, Guangyang Dai, Shengli Guo, Changqing Jin, Rafael M. Fernandes, David W. Tam, Bijuan Chen, Ifeanyi John Onuorah, Benjamin A. Frandsen, Pengcheng Dai, Yipeng Cai, Weiyi Wang, Yasutomo J. Uemura, Fanlong Ning, Zurab Guguchia, Graeme Luke, Chongde Cao, Roberto De Renzi, Timothy J. S. Munsie, Alannah Hallas, Sky C. Cheung, Kohtaro Yamakawa, Eduardo Miranda, Dalson Eloy Almeida
Publikováno v:
Physical Review B. 97
Muon spin rotation and relaxation studies have been performed on a "111" family of iron-based superconductors NaFe_1-xNi_xAs. Static magnetic order was characterized by obtaining the temperature and doping dependences of the local ordered magnetic mo
Autor:
Sky C. Cheung, Zurab Guguchia, Benjamin A. Frandsen, Zizhou Gong, Kohtaro Yamakawa, Dalson E. Almeida, Ifeanyi J. Onuorah, Pietro Bonfá, Eduardo Miranda, Weiyi Wang, David W. Tam, Yu Song, Chongde Cao, Yipeng Cai, Alannah M. Hallas, Murray N. Wilson, Timothy J. S. Munsie, Graeme Luke, Bijuan Chen, Guangyang Dai, Changqing Jin, Shengli Guo, Fanlong Ning, Rafael M. Fernandes, Roberto De Renzi, Peng
Publikováno v:
Physical Review B
Autor:
Kohei Matsuura1, Masaki Roppongi1, Mingwei Qiu1, Qi Sheng2, Yipeng Cai3,4, Kohtaro Yamakawa2, Guguchia, Zurab2, Day, Ryan P.3,4, Kojima, Kenji M.3,5, Damascelli, Andrea3,4, Yuichi Sugimura1, Mikihiko Saito1, Takaaki Takenaka1, Kota Ishihara1, Yuta Mizukami1, Kenichiro Hashimoto1, Yilun Gu6, Shengli Guo6, Licheng Fu6, Zheneng Zhang6
Publikováno v:
Proceedings of the National Academy of Sciences of the United States of America. 5/23/2023, Vol. 120 Issue 21, p1-6. 13p.