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• W3156450003 abstract "With the aid of both a semianalytical and a numerically exact method, we investigate the charge dynamics in the vicinity of half-filling in the one- and two-dimensional $ttext{ensuremath{-}}J$ model derived from a Fermi-Hubbard model in the limit of large interaction $U$ and hence small exchange coupling $J$. The spin degrees of freedom are taken to be disordered. So we consider the limit $0<Jensuremath{ll}Tensuremath{ll}W$, where $W$ is the bandwidth. We focus on evaluating the local spectral density of a single hole excitation and the charge gap that separates the upper and the lower Hubbard band. We find indications that no band edges exist if the magnetic exchange is taken into account; instead of band edges, Gaussian tails seem to appear. A discussion of the underlying physics is provided." @default.
• W3156450003 created "2021-04-26" @default.
• W3156450003 creator A5012236483 @default.
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• W3156450003 date "2022-02-14" @default.
• W3156450003 modified "2023-09-23" @default.
• W3156450003 title "Charge dynamics in magnetically disordered Mott insulators" @default.
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• W3156450003 doi "https://doi.org/10.1103/physrevb.105.085121" @default.
• W3156450003 hasPublicationYear "2022" @default.
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