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Magnetic order, disorder, and excitations under pressure in the Mott insulator Sr2IrO4
https://oist.repo.nii.ac.jp/records/2395
https://oist.repo.nii.ac.jp/records/23950419a119-97a7-41fd-8576-f65c2794607f
名前 / ファイル | ライセンス | アクション |
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Li-2021-Magnetic order, disorder, and excitati (791.8 kB)
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Creative Commons Attribution 4.0 International(https://creativecommons.org/licenses/by/4.0/)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2021-11-29 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Magnetic order, disorder, and excitations under pressure in the Mott insulator Sr2IrO4 | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者(英) |
Li, Xiang
× Li, Xiang× Cooper, S. E.× Krishnadas, A.× de la Torre, A.× Perry, R. S.× Baumberger, F.× Silevitch, D. M.× Hsieh, D.× Rosenbaum, T. F.× Feng, Yejun |
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書誌情報 |
en : Physical Review B 巻 104, 号 20, p. L201111, 発行日 2021-11-19 |
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抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Protected by the interplay of on-site Coulomb interactions and spin-orbit coupling, Sr₂IrO₄ at high pressure is a rare example of a Mott insulator with a paramagnetic ground state. Here, using optical Raman scattering, we measure both the phonon and magnon evolution in Sr2IrO4 under pressure and identify three different magnetically-ordered phases, culminating in a spin-disordered state beyond 18 GPa. A strong first-order structural phase transition drives the magnetic evolution at ∼10 GPa with reduced structural anisotropy in the IrO₆ cages, leading to increasingly isotropic exchange interactions between the Heisenberg spins and a spin-flip transition to c-axis-aligned antiferromagnetic order. In the disordered phase of Heisenberg Jeff = 1/2 pseudospins, the spin excitations are quasielastic and continuous to 10 meV, potentially hosting a gapless quantum spin liquid in Sr₂IrO₄. | |||||
出版者 | ||||||
出版者 | American Physical Society | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2469-9950 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2469-9969 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1103/PhysRevB.104.L201111 | |||||
権利 | ||||||
権利情報 | © 2021 American Physical Society. | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://journals.aps.org/prb/abstract/10.1103/PhysRevB.104.L201111 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |