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- W4328138841 abstract "We carry out a systematic study of collective spin- and charge excitations for the canonical single-band Hubbard, $t$-$J$-$U$, and $t$-$J$ models of high-temperature copper-oxide superconductors, both on electron- and hole-doped side of the phase diagram. Recently developed variational wave function approach, combined with the expansion in inverse number of fermionic flavors, is employed. All three models exhibit a substantial electron-hole asymmetry of magnetic excitations, with a robust paramagnon emerging for hole-doping, in agreement with available resonant inelastic $x$-ray scattering data for the cuprates. The $t$-$J$ model yields additional high-energy peak in the magnetic spectrum that is not unambiguously identified in spectroscopy. For all considered Hamiltonians, the dynamical charge susceptibility contains a coherent mode for both hole- and electron doping, with overall bandwidth renormalization controlled by the on-site Coulomb repulsion. Away from the strong-coupling limit, the antiferromagnetic ordering tendency is more pronounced on electron-doped side of the phase diagram." @default.
- W4328138841 created "2023-03-22" @default.
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- W4328138841 date "2023-02-01" @default.
- W4328138841 modified "2023-09-26" @default.
- W4328138841 title "Electron-Hole Asymmetry of Quantum Collective Excitations in High-T<sub>c</sub> Copper Oxides" @default.
- W4328138841 doi "https://doi.org/10.12693/aphyspola.143.180" @default.
- W4328138841 hasPublicationYear "2023" @default.
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