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- W3048665747 abstract "Hexagonal CoSn is a newly discovered frustrated kagome metal. It shows close-to-textbook flat bands and orbital-selective Dirac fermions, which are largely associated with its strongly correlated Co $3d$ orbitals. Because correlated electronic states are easily regulated by external conditions (such as chemical doping, pressure, and temperature), the fate of these kagome-derived electronic bands upon temperature becomes an interesting and unsolved question. In this work, we try to study the temperature-dependent electronic structures of hexagonal CoSn by means of the density functional theory in conjunction with the embedded dynamical mean-field theory. We find that the Co $3d$ electrons are in close proximity to Mott insulating states at ambient condition. Special attention is devoted to the evolution of Co $3d$ electronic states with respect to temperature. At least six different temperatures (or energy scales), namely ${T}^{*}$, ${T}_{text{FL}}$, ${T}_{text{S1}}$ (and ${T}_{text{S2}}$), ${T}_{text{SF}}$, and $overline{T}$, are figured out. They are related to stabilization of the ``pseudogap'' state, emergence of the non-Fermi-liquid phase, onset (and completeness) of the spin plateau, occurrence of the spin-frozen phase, and beginning of the orbital freezing transition, respectively." @default.
- W3048665747 created "2020-08-18" @default.
- W3048665747 creator A5006572474 @default.
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- W3048665747 date "2022-04-18" @default.
- W3048665747 modified "2023-10-16" @default.
- W3048665747 title "Temperature dependence of correlated electronic states in the archetypal kagome metal CoSn" @default.
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- W3048665747 doi "https://doi.org/10.1103/physrevb.105.155131" @default.
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