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- W2113014540 abstract "The spin configuration induced by single holes and hole pairs doped into stoichiometric, antiferromagnetic cuprates is considered. Unrestricted Hartree–Fock calculations for the three-band Hubbard model are employed to study spin-polaron and vortex-like (meron) solutions. Meron solutions for a single hole are found to be metastable with higher energy than spin polarons. We observe that the meron solution shifts from site-centered to bond-centered as the interaction is increased. Meron–antimeron solutions for hole pairs are found to be unstable. The results are in agreement with earlier findings for the one-band Hubbard model. However, we find that the Hubbard interaction of the one-band model has to be chosen similar to the one of the three-band model to obtain comparable results, not of the order of the charge-transfer gap, as previously expected." @default.
- W2113014540 created "2016-06-24" @default.
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- W2113014540 date "2003-11-01" @default.
- W2113014540 modified "2023-10-02" @default.
- W2113014540 title "Topological doping of repulsive Hubbard models" @default.
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- W2113014540 doi "https://doi.org/10.1016/s0921-4526(03)00492-7" @default.
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