Ordering transition in a Fermi gas interacting with an Ising chain

J. Maćkowiak

Physica A: Statistical Mechanics and its Applications, 1992, vol. 180, issue 1, 171-181

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.

Date: 1992
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:180:y:1992:i:1:p:171-181

DOI: 10.1016/0378-4371(92)90113-5

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