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- W2014976280 abstract "Abstract Bound hole states induced by excess oxygen in La2CuO4+δ and YBa2Cu3O6+x are studied in the framework of the extended Hubbard model with the use of the spin-wave approximation and the Lanczos algorithm. We interpret the band at 0.5 eV in the impurity reflectivity spectrum of La2CuO4+δ as a manifestation of the transition from the lowest bound hole level (S z = 1 2 ) to band states. It is shown that for realistic parameters an excess O2− ion does not lead to the formation of a ferromagnetically ordered region of Cu spins around a localized hole (ferron). On the other hand, a spin-carrying O− defect in Cu–O chains of YBa2Cu3O6+x does generate such excitation at small hole concentrations." @default.
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- W2014976280 date "2000-07-01" @default.
- W2014976280 modified "2023-09-27" @default.
- W2014976280 title "Bound hole states and ferrons in HTSC" @default.
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- W2014976280 doi "https://doi.org/10.1016/s0921-4526(99)01965-1" @default.
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