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Two-magnon excitations in resonant inelastic x-ray scattering studied within spin density wave formalism
https://repo.qst.go.jp/records/48481
https://repo.qst.go.jp/records/484813f6beddf-6964-4f99-82fe-dcc2a3d3c3ea
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-02-08 | |||||
| タイトル | ||||||
| タイトル | Two-magnon excitations in resonant inelastic x-ray scattering studied within spin density wave formalism | |||||
| 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 | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Nomura, Takuji
× Nomura, Takuji× 野村 拓司 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We study two-magnon excitations in resonant inelastic x-ray scattering (RIXS) at the transition-metal K edge.Instead of working with effective Heisenberg spin models, we work with a Hubbard-type model (d-p model) for a typical insulating cuprate La2CuO4 . For the antiferromagnetic ground state within the spin density wave (SDW) mean-field formalism, we calculate the dynamical correlation function within the random-phase approximation (RPA), and then obtain two-magnon excitation spectra by calculating the convolution of it. Coupling between the K-shell hole and the magnons in the intermediate state is calculated by means of diagrammatic perturbation expansion in the Coulomb interaction. The calculated momentum dependence of RIXS spectra agrees well with that of experiments. A notable difference from previous calculations based on the Heisenberg spin models is that RIXS spectra have a large two-magnon weight near the zone center, which may be confirmed by further careful high-resolution experiments. |
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| 書誌情報 |
Physical Review B 巻 96, p. 165128-1-165128-10, 発行日 2017-10 |
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| 出版者 | ||||||
| 出版者 | アメリカ物理学会 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1103/PhysRevB.96.165128 | |||||
