Separation between low-energy hole dynamics and spin dynamics in a frustrated magnet

Kou Takubo; Yusuke Nambu; Satoru Nakatsuji; Yuki Wakisaka; Takaaki Sudayama; David Fournier; Giorgio Levy; Andrea Damascelli; Masashi Arita; Hirofumi Namatame; Masaki Taniguchi; Takashi Mizokawa

doi:10.1103/PhysRevLett.104.226404

Separation between low-energy hole dynamics and spin dynamics in a frustrated magnet

Kou Takubo, Yusuke Nambu, Satoru Nakatsuji, Yuki Wakisaka, Takaaki Sudayama, David Fournier, Giorgio Levy, Andrea Damascelli, Masashi Arita, Hirofumi Namatame, Masaki Taniguchi, Takashi Mizokawa

先進理工学部

研究成果: Article

6 引用（Scopus）

抜粋

An angle-resolved photoemission spectroscopy (ARPES) study is reported on a Mott insulator NiGa2S4 in which Ni2⁺ (S=1) ions form a triangular lattice and the Ni spins do not order even in its ground state. The first ARPES study on the two-dimensional spin-disordered system shows that low-energy hole dynamics at high temperatures is characterized by wave vectors QE which are different from wave vectors QM dominating low-energy spin excitations at low temperatures. The unexpected difference between QE and QM is deeply related to charge fluctuation across the Mott gap in the frustrated lattice and is a key issue to understand the spin-disordered ground states in Mott insulators.

元の言語	English
記事番号	226404
ジャーナル	Physical Review Letters
巻	104
発行部数	22
DOI	https://doi.org/10.1103/PhysRevLett.104.226404
出版物ステータス	Published - 2010 6 3

フィンガープリント

ASJC Scopus subject areas

Physics and Astronomy(all)

これを引用

Takubo, K., Nambu, Y., Nakatsuji, S., Wakisaka, Y., Sudayama, T., Fournier, D., Levy, G., Damascelli, A., Arita, M., Namatame, H., Taniguchi, M., & Mizokawa, T. (2010). Separation between low-energy hole dynamics and spin dynamics in a frustrated magnet. Physical Review Letters, 104(22), [226404]. https://doi.org/10.1103/PhysRevLett.104.226404

Separation between low-energy hole dynamics and spin dynamics in a frustrated magnet. / Takubo, Kou; Nambu, Yusuke; Nakatsuji, Satoru; Wakisaka, Yuki; Sudayama, Takaaki; Fournier, David; Levy, Giorgio; Damascelli, Andrea; Arita, Masashi; Namatame, Hirofumi; Taniguchi, Masaki; Mizokawa, Takashi.

：: Physical Review Letters, 巻 104, 番号 22, 226404, 03.06.2010.

研究成果: Article

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AU - Sudayama, Takaaki

AU - Fournier, David

AU - Levy, Giorgio

AU - Damascelli, Andrea

AU - Arita, Masashi

AU - Namatame, Hirofumi

AU - Taniguchi, Masaki

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文献にアクセス

10.1103/PhysRevLett.104.226404