Thermodynamics of the half-filled Kondo lattice model around the atomic limit

Details Thermodynamics of the half-filled Kondo lattice model around the atomic limit Thermodynamics of the half-filled Kondo lattice model around the atomic limit

2002-07-22

arxiv.org/abs/cond-mat/0207509v1

Phys. Rev. B 66, 052404(2002)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures, to appear in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.66.052404

We present a perturbation theory for studying thermodynamic properties of the Kondo spin liquid phase of the half-filled Kondo lattice model. The grand partition function is derived to calculate chemical potential, spin and charge susceptibilities and specific heat. The treatment is applicable to the model with strong couplings in any dimensions (one, two and three dimensions). The chemical potential equals zero at any temperatures, satisfying the requirement of the particle-hole symmetry. Thermally activated behaviors of the spin(charge) susceptibility due to the spin(quasiparticle) gap can be seen and the two-peak structure of the specific heat is obtained. The same treatment to the periodic Anderson model around atomic limit is also briefly discussed.

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