Zobrazeno 1 - 10
of 265
pro vyhledávání: '"Yasutomo J. Uemura"'
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:
Tatsuo Goko, Carlos J. Arguello, Andreas Hamann, Thomas Wolf, Minhyea Lee, Dmitry Reznik, Alexander Maisuradze, Rustem Khasanov, Elvezio Morenzoni, Yasutomo J. Uemura
Publikováno v:
npj Quantum Materials, Vol 2, Iss 1, Pp 1-6 (2017)
Quantum criticality: Iron aids restoration An exotic quantum state of matter is identified in a new material by researchers in the USA, Switzerland and Germany. Yasutomo Uemura from Columbia University and co-workers observe quantum criticality in a
Externí odkaz:
https://doaj.org/article/3a0938a7d7504966892cc712c81b9de4
Autor:
Benjamin A. Frandsen, Lian Liu, Sky C. Cheung, Zurab Guguchia, Rustem Khasanov, Elvezio Morenzoni, Timothy J. S. Munsie, Alannah M. Hallas, Murray N. Wilson, Yipeng Cai, Graeme M. Luke, Bijuan Chen, Wenmin Li, Changqing Jin, Cui Ding, Shengli Guo, Fanlong Ning, Takashi U. Ito, Wataru Higemoto, Simon J. L. Billinge, Shoya Sakamoto, Atsushi Fujimori, Taito Murakami, Hiroshi Kageyama, Jose Antonio Alonso, Gabriel Kotliar, Masatoshi Imada, Yasutomo J. Uemura
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-8 (2016)
Knowing whether a quantum phase transition is first- or second-order is crucial for understanding any associated exotic phenomena, but direct experimental evidence has been scarce. Here, Frandsen et al. report first-order magnetic quantum phase trans
Externí odkaz:
https://doaj.org/article/7e9919722cb14d35b9ea6ded90e31820
Autor:
Shuang Yu, Guoqiang Zhao, Yi Peng, Xiancheng Wang, Qingqing Liu, Runze Yu, Sijia Zhang, Jianfa Zhao, Wenmin Li, Zheng Deng, Yasutomo J. Uemura, Changqing Jin
Publikováno v:
Crystals, Vol 10, Iss 8, p 690 (2020)
A series of polycrystalline samples of a new diluted magnetic semiconductor (DMS) (Ba,K)(Zn,Mn)2Sb2 has been synthesized and systematically studied. The parent phase is the so-called “Zintl compound” BaZn2Sb2, a week-degenerate semiconductor with
Externí odkaz:
https://doaj.org/article/3e3b65206cdc49c794fbfd88d1972e69
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:
Hakuto Suzuki, Guoqiang Zhao, Jun Okamoto, Shoya Sakamoto, Zhi-Yin Chen, Yosuke Nonaka, Goro Shibata, Kan Zhao, Bijuan Chen, Wen-Bin Wu, Fan-Hsiu Chang, Hong-Ji Lin, Chien-Te Chen, Arata Tanaka, Masaki Kobayashi, Bo Gu, Sadamichi Maekawa, Yasutomo J. Uemura, Changqing Jin, Di-Jing Huang, Atsushi Fujimori
Publikováno v:
Journal of the Physical Society of Japan. 91
Autor:
G. R. Stewart, H. J. Lin, Xinlu Wang, Changqing Jin, Zizhou Gong, Runze Yu, Zhiwei Hu, Youwen Long, Qingzhen Huang, Yasutomo J. Uemura, Jian Zhao, S. Uchida, Zurab Guguchia, W. M. Li, C. T. Chen, Longxing Cao, Hui Wu, Jinhee Kim
Publikováno v:
Journal of Superconductivity and Novel Magnetism. 33:81-85
A new Ba2CuO4-y superconductor with critical temperature (Tc) exceeding 70 K was discovered. The X-ray absorption measurement gives evidence that this cuprate resembles La2CuO4 but is doped with a fairly large amount of holes, while in contrast to th
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, Liu Yaoqian, Hui Wu, Qiufeng Liu, Jinhee Kim, Yasutomo J. Uemura, S. Uchida, Xinlu Wang, Jian Zhao, Zurab Guguchia, Zhi Li, G. R. Stewart, Zizhou Gong, Runze Yu, Ju-Yuan Zhang, Qingzhen Huang, Longxing Cao, Guang Zhao, Zhiwei Hu, W. M. Li, C. T. Chen, Youwen Long, H. J. Lin
Publikováno v:
Proceedings of the National Academy of Sciences. 116:12156-12160
The mechanism of superconductivity in cuprates remains one of the big challenges of condensed matter physics.High Tc cuprates crystallize into layered perovskite structure featuring copper oxygen octahedral coordination. Due to the Jahn Teller effect
Autor:
Jiecai Zhao, Bo Gu, Changqing Jin, Rencheng Yu, Zhiting Deng, Guijuan Zhao, Wen-Zhu Li, Q. Q. Liu, Sadamichi Maekawa, Xingyu Zhu, Yasutomo J. Uemura, Xi Shen, Binfan Chen, Shui-Yan Yu, Lei Cao, W. Han, Xuezhao Wang, Yunfeng Peng
Publikováno v:
Scientific Reports, Vol 9, Iss 1, Pp 1-6 (2019)
Scientific Reports
Scientific Reports
We report a new diluted ferromagnetic semiconductor Li1+y(Cd,Mn)P, wherein carrier is doped via excess Li while spin is doped by isovalence substitution of Mn2+ into Cd2+. The extended Cd 4d-orbitals lead to more itinerant characters of Li1+y(Cd,Mn)P