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Ordering transition in a Fermi gas interacting with an Ising chain

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  • Maćkowiak, J.

Abstract

A one-dimensional Kondo lattice of n spin-12 fermions, interacting ferromagnetically via an equivalent-neighbour Ising potential with an Ising chain, is studied. The free energy per fermion is equal in the thermodynamic limit to that of a non-interacting Fermi gas and an Ising chain in a mean field. It is shown that the system exhibits a second-order phase transition in the case that the coupling in the Ising chain is ferromagnetic or weakly antiferromagnetic and no phase transition in the case that it is strongly antiferromagnetic.

Suggested Citation

  • Maćkowiak, J., 1992. "Ordering transition in a Fermi gas interacting with an Ising chain," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 180(1), pages 171-181.
    • Handle: RePEc:eee:phsmap:v:180:y:1992:i:1:p:171-181
    DOI: 10.1016/0378-4371(92)90113-5
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