Large Variety of the On-Site Order Parameters and Phase States in Quasi-2D HTSC Cuprates
- Авторы: Moskvin A.1
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Учреждения:
- Institute of Natural Sciences and Mathematics, Ural Federal University Named after the First President of Russia B.N. Yeltsin
- Выпуск: Том 120, № 13 (2019)
- Страницы: 1252-1259
- Раздел: Article
- URL: https://journals.rcsi.science/0031-918X/article/view/168905
- DOI: https://doi.org/10.1134/S0031918X19130179
- ID: 168905
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Аннотация
Starting with a minimal model in which the on-site Hilbert space is reduced to only three effective valence centers \({\text{CuO}}_{4}^{{7 - ,6 - ,5 - }}\) (nominally \({\text{C}}{{{\text{u}}}^{{1 + ,2 + ,3 + }}}\)), we present a unified approach to the description of variety of the local intra-unit-cell order parameters in high-T\(_{c}\) cuprates going beyond Zhang–Rice model and address recent experimental findings. Central point of the model implies the occurrence of unconventional on-site quantum superpositions of three valent states characterized by different hole occupation: \({{n}_{h}}\) = 0, 1, 2 for \({\text{C}}{{{\text{u}}}^{{1 + ,2 + ,3 + }}}\) centers, respectively, different conventional spin: s = 1/2 for \({\text{C}}{{{\text{u}}}^{{2 + }}}\) center and s = 0 for \({\text{C}}{{{\text{u}}}^{{1 + ,3 + }}}\) centers, and different orbital symmetry:\({{B}_{{1g}}}\) for the ground state of the \({\text{C}}{{{\text{u}}}^{{2 + }}}\) centers, \({{A}_{{1g}}}\) for the \({\text{C}}{{{\text{u}}}^{{1 + }}}\) centers, and the Zhang–Rice (ZR) \({{A}_{{1g}}}\) or more complicated low-lying non-ZR states for \({\text{C}}{{{\text{u}}}^{{3 + }}}\) center.
Об авторах
A. Moskvin
Institute of Natural Sciences and Mathematics, Ural Federal University Named after the First President of Russia B.N. Yeltsin
Автор, ответственный за переписку.
Email: alexander.moskvin@urfu.ru
Россия, Ekaterinburg, 620083