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2018 | 133 | 3 | 369-371
Article title

Peculiar Thermodynamic Properties of the Falicov-Kimball Model for small U Couplings

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EN
Abstracts
EN
We analyse a behaviour of the order parameter and specific heat of the Falicov-Kimball model (FKM) on the Bethe lattice using the Dynamical Mean Field Theory (DMFT) formalism, which provides the exact solution in the limit of large spatial dimensions. In the large U limit, the FKM maps onto the effective Ising model, with the order parameter of the Curie-Weiss form. However, in the small U limit the order parameter takes on unusual shape, with a sharp reduction near T ≈ T_{c}/2. We focus our investigation on a crossover between these two limits, thus we perform our calculations for a set of intermediate and small values of U. We find the overall behaviour of the order parameter and specific heat as a function of temperature to be quite anomalous.
Keywords
EN
Year
Volume
133
Issue
3
Pages
369-371
Physical description
Dates
published
2018-03
References
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  • [5a] A. Shvaika, J.K. Freericks, Phys. Rev. B 67, 153103 (2003), doi: 10.1103/PhysRevB.67.153103
  • [5b] R. Lemański, K. Ziegler, Phys. Rev. B 89, 075104 (2014), doi: 10.1103/PhysRevB.89.075104
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv133n3p010kz
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