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- W2113447204 abstract "The finite temperature properties of the Falicov-Kimball model are studied in two dimensions using small-cluster exact-diagonalization calculations. The resultant exact solutions are used to examine the f-state occupation (nf), the specific heat (C), and the specific heat coefficient (γ), as functions of temperature (τ=kBT) and f-level energy (Ef). A number of remarkable results are found. (i) In all cases nf is a smooth function of τ and Ef. No discontinuous transitions occur at finite temperatures. (ii) The specific-heat curves exhibit a broad single-peak structure of Shottky form (‖Ef‖ large), as wel as a two-peak structure consisting of a sharp peak of Ising type followed by a broad peak of Shottky type (‖Ef‖ small). (iii) The specific-heat coefficient is extremely enhanced at low temperatures for some values of Ef. (iv) Depending on a range of parameters used, the system exhibits intermediate-valence behavior as well as some features of heavy-fermion behavior." @default.
- W2113447204 created "2016-06-24" @default.
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- W2113447204 date "1997-02-01" @default.
- W2113447204 modified "2023-09-30" @default.
- W2113447204 title "Electronic phase transitions in the Falicov-Kimball model" @default.
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- W2113447204 doi "https://doi.org/10.1016/s0921-4526(96)00624-2" @default.
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