K
Kyoko Ishizaka
Researcher at University of Tokyo
Publications - 125
Citations - 8556
Kyoko Ishizaka is an academic researcher from University of Tokyo. The author has contributed to research in topics: Angle-resolved photoemission spectroscopy & Photoemission spectroscopy. The author has an hindex of 31, co-authored 111 publications receiving 7628 citations. Previous affiliations of Kyoko Ishizaka include Global Alliance in Management Education & National Presto Industries.
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Journal ArticleDOI
Magnetic control of ferroelectric polarization
Tsuyoshi Kimura,Tsuyoshi Kimura,Takeshi Goto,Hiroshi Shintani,Kyoko Ishizaka,Taka-hisa Arima,Yoshinori Tokura +6 more
TL;DR: The discovery of ferroelectricity in a perovskite manganite, TbMnO3, where the effect of spin frustration causes sinusoidal antiferromagnetic ordering and gigantic magnetoelectric and magnetocapacitance effects are found.
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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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Distorted perovskite with e g 1 configuration as a frustrated spin system
Tatsumi Kimura,Sumio Ishihara,Hiroshi Shintani,Taka-hisa Arima,Kazuyuki Takahashi,Kyoko Ishizaka,Yasuhiro Tokura +6 more
TL;DR: In this article, the evolution of spin and orbital-ordered states has been investigated for a series of insulating perovskites with a large distortion, which is regarded as a frustrated spin system having ferromagnetic nearest-neighbor and antiferromagnetic (AF) next-NEIGHbor (NNN) interactions.
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Valley-dependent spin polarization in bulk MoS2 with broken inversion symmetry
Ryuji Suzuki,M. Sakano,Yijin Zhang,Ryosuke Akashi,Daisuke Morikawa,Ayumi Harasawa,Koichiro Yaji,Kenta Kuroda,Koji Miyamoto,Taichi Okuda,Kyoko Ishizaka,Ryotaro Arita,Yoshihiro Iwasa +12 more
TL;DR: The direct observation of valley-dependent out-of-plane spin polarization in an archetypal transition-metal dichalcogenide--MoS2--using spin- and angle-resolved photoemission spectroscopy is reported, in fair agreement with a first-principles theoretical prediction.
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Redox Control and High Conductivity of Nickel Bis(dithiolene) Complex π‑Nanosheet: A Potential Organic Two-Dimensional Topological Insulator
Tetsuya Kambe,Ryota Sakamoto,Tetsuro Kusamoto,Tigmansu Pal,Naoya Fukui,Ken Hoshiko,Takahiro Shimojima,Zhengfei Wang,Toru Hirahara,Kyoko Ishizaka,Shuji Hasegawa,Feng Liu,Hiroshi Nishihara +12 more
TL;DR: This work provides a foothold for the development of the first organic-based two-dimensional topological insulator, which will require the precise control of the oxidation state in the single-layer nickel bisdithiolene complex nanosheet.