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Localized character of charge excitations for La2−xSrxNiO4+delta revealed by oxygen K-edge resonant inelastic X-ray scattering
https://repo.qst.go.jp/records/80800
https://repo.qst.go.jp/records/8080064676a1a-28c3-4106-b6e8-03c1e03cbdff
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-04-03 | |||||
| タイトル | ||||||
| タイトル | Localized character of charge excitations for La2−xSrxNiO4+delta revealed by oxygen K-edge resonant inelastic X-ray scattering | |||||
| 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 |
Yamagami, Kohei
× Yamagami, Kohei× Ishii, Kenji× Hirata, Yasuyuki× Ikeda, Keisuke× Miyawaki, Jun× Harada, Yoshihisa× Miyazaki, Masanori× Asano, Shun× Fujita, Masaki× Wadati, Hiroki× Kenji, Ishii× Jun, Miyawaki |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We performed a resonant inelastic x-ray scattering (RIXS) study of La2−xSrxNiO4+delta (LSNO) at the oxygen K edge to investigate the nature of the doped holes with regard to charge excitations. Charge excitations of the hole-doped nickelates are found to be almost independent of momentum transfer, indicating that the doped holes are strongly localized in character. Additionally, conspicuous changes in energy position are in temperature dependence. These characters are observed in stark contrast to those of the high-Tc cuprate La2−xSrxCuO4 (LSCO), where delocalized doped holes form charge excitations with sizable momentum dependence in the CuO2 plane. This distinct nature of charge excitations of doped holes is consistent with the metallicity of the materials and could be caused by strong electron-phonon coupling and weak quantum spin fluctuation in the nickelates. | |||||
| 書誌情報 |
Physical Review B 巻 102, 号 16, p. 165145-1-165145-7, 発行日 2020-10 |
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| 出版者 | ||||||
| 出版者 | アメリカ物理学会 | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 2469-9950 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1103/PhysRevB.102.165145 | |||||
| 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.102.165145 | |||||
