Y
Youichi Murakami
Researcher at KEK
Publications - 233
Citations - 6582
Youichi Murakami is an academic researcher from KEK. The author has contributed to research in topics: Scattering & Antiferromagnetism. The author has an hindex of 36, co-authored 233 publications receiving 5851 citations. Previous affiliations of Youichi Murakami include Tohoku University & Tokyo Institute of Technology.
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Journal ArticleDOI
Ferroelectricity from iron valence ordering in the charge-frustrated system LuFe2O4.
Naoshi Ikeda,Hiroyuki Ohsumi,Kenji Ohwada,Kenji Ishii,Toshiya Inami,Kazuhisa Kakurai,Youichi Murakami,Kenji Yoshii,Shigeo Mori,Yoichi Horibe,Hijiri Kito +10 more
TL;DR: Experimental evidence for ferroelectricity arising from electron correlations in the triangular mixed valence oxide, LuFe2O4 is reported, and resonant X-ray scattering measurements are used to determine the ordering of the Fe2+ and Fe3+ ions.
Journal ArticleDOI
Giant Rashba-type spin splitting in bulk BiTeI
Kyoko Ishizaka,Mohammad Saeed Bahramy,H. Murakawa,M. Sakano,Takahiro Shimojima,T. Sonobe,K. Koizumi,Shik Shin,Hirokazu Miyahara,Akio Kimura,Koji Miyamoto,Taichi Okuda,Hirofumi Namatame,Masaki Taniguchi,Masaki Taniguchi,Ryotaro Arita,Naoto Nagaosa,Kensuke Kobayashi,Youichi Murakami,Reiji Kumai,Reiji Kumai,Yoshio Kaneko,Yoshinori Onose,Yoshinori Tokura +23 more
TL;DR: The finding of a huge spin-orbit interaction effect in a polar semiconductor composed of heavy elements, BiTeI, where the bulk carriers are ruled by large Rashba-likespin splitting is described, confirming that the spin splitting is indeed derived from bulk atomic configurations.
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Three-way switching in a cyanide-bridged [CoFe] chain
Norihisa Hoshino,Fumichika Iijima,Graham N. Newton,Norifumi Yoshida,Takuya Shiga,Hiroyuki Nojiri,Akiko Nakao,Reiji Kumai,Youichi Murakami,Hiroki Oshio +9 more
TL;DR: A cyanide-bridged [CoFe] one-dimensional chiral coordination polymer that displays both magnetic and electric bistabilities in the same temperature range is described.
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Above-room-temperature ferroelectricity and antiferroelectricity in benzimidazoles
Sachio Horiuchi,Fumitaka Kagawa,Kensuke Hatahara,Kensuke Kobayashi,Reiji Kumai,Youichi Murakami,Yoshinori Tokura +6 more
TL;DR: It is demonstrated that chains of imidazole molecules can often be bistable in electric polarity and electrically switchable, even in the crystalline state, through proton tautomerization, in the quest for lead- and rare-metal-free ferroelectric devices.
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Quantum Hall effect in a bulk antiferromagnet EuMnBi2 with magnetically confined two-dimensional Dirac fermions
Hidetoshi Masuda,Hideaki Sakai,Masashi Tokunaga,Yuichi Yamasaki,Atsushi Miyake,Junichi Shiogai,Shintaro Nakamura,Satoshi Awaji,Atsushi Tsukazaki,Hironori Nakao,Youichi Murakami,Taka-hisa Arima,Yoshinori Tokura,Shintaro Ishiwata +13 more
TL;DR: A bulk half-integer quantum Hall effect in a layered antiferromagnet EuMnBi2, in which field-controllable Eu magnetic order significantly suppresses the interlayer coupling between the Bi layers with Dirac fermions, will pave a route to the engineering of magnetically functionalized Dirac materials.