Spin-reflection positivity of the Kondo lattice at half-filling
Abstract
Description
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.
RevTex, to be published in Phys. Rev. B. No figures
RevTex, to be published in Phys. Rev. B. No figures