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Post-growth annealing effects on charge and spin excitations in Nd2−xCexCuO4
https://repo.qst.go.jp/records/81981
https://repo.qst.go.jp/records/819819b50b4dd-da6e-4fe2-a5e3-84ae5d6395a0
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2021-02-24 | |||||
| タイトル | ||||||
| タイトル | Post-growth annealing effects on charge and spin excitations in Nd2−xCexCuO4 | |||||
| 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 |
Ishii, Kenji
× Ishii, Kenji× Asano, Shun× Ashida, Masumi× Fujita, Masaki× Yu, Biqiong× Greven, Martin× Okamoto, Jun× Di-Jing, Huang× Kenji, Ishii |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We report a Cu K- and L3-edge resonant inelastic x-ray scattering study of charge and spin excitations of bulk Nd2−xCexCuO4, with a focus on post-growth annealing effects. For the parent compound Nd2CuO4 (x = 0), a clear charge-transfer gap is observed in the as-grown state, whereas the charge excitation spectra indicate that electrons are doped in the annealed state. This is consistent with the observation that annealed thin-film and polycrystalline samples of RE2CuO4 (RE = rare earth) can become metallic and superconducting at sufficiently high electron concentrations without Ce doping. For x = 0.16, a Ce concentration for which it is known that oxygen reduction destroys long-range antiferromagnetic order and induces superconductivity, we find that the high-energy spin excitations of non-superconducting as-grown and superconducting annealed crystals are nearly identical. This finding is in stark contrast to the significant changes in the low-energy spin excitations previously observed via neutron scattering. | |||||
| 書誌情報 |
Physical Review Materials 巻 5, 号 2, p. 024803, 発行日 2021-02 |
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| 出版者 | ||||||
| 出版者 | APS | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 2475-9953 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1103/PhysRevMaterials.5.024803 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://journals.aps.org/prmaterials/abstract/10.1103/PhysRevMaterials.5.024803 | |||||
