Spin-reflection positivity of the Kondo lattice at half-filling

Details Spin-reflection positivity of the Kondo lattice at half-filling Spin-reflection positivity of the Kondo lattice at half-filling

1995-12-22

arxiv.org/abs/cond-mat/9512160v1

Physics

Condensed Matter

RevTex, to be published in Phys. Rev. B. No figures

Scientific paper

We examine the spin-reflection positivity of the ground state of the Kondo
lattice model at half-filling with the antiferromagnetic and ferromagnetic
exchange couplings $J\ne0$. For every positive $U>0$, where U is the Coulomb
interaction between the conduction electrons, we can show that the ground state
is unique.

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