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- W2090596465 abstract "As recent angular-resolved photoemission spectroscopy experiments have shown, even an insulator can exhibit a ``remnant'' Fermi surface (FS), i.e., a boundary line between mostly occupied and mostly unoccupied states in the Brillouin zone. We derive an analytic expression for the remnant FS valid to order ${(t/U)}^{2}$ for the large-$U$ limit of the single-band Hubbard model at half-filling. The shape of the remnant FS at low temperature $(Tensuremath{ll}Jensuremath{equiv}{4t}^{2}/U)$ is found to be determined by local magnetic correlations, and is largely independent of the details of the band FS. However, miraculously, at intermediate temperatures $(Jensuremath{ll}Tensuremath{ll}U),$ where magnetic correlations are weak, the location of the remnant FS coincides with the band FS." @default.
- W2090596465 created "2016-06-24" @default.
- W2090596465 creator A5005306923 @default.
- W2090596465 date "2001-03-28" @default.
- W2090596465 modified "2023-09-27" @default.
- W2090596465 title "Temperature dependence of the spectral weight in undoped Mott insulators" @default.
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- W2090596465 doi "https://doi.org/10.1103/physrevb.63.153102" @default.
- W2090596465 hasPublicationYear "2001" @default.
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