Nonmagnetic spin polaron in a generalized Hubbard model for CuO2 planes
Glazman L. I. , Ioselevich A. S.
States of an additional particle are analyzed in a generalized Hubbard model which is equivalent to a Kondo lattice with spin-dependent amplitudes for intersite transitions. A hole forms bound complexes with lattice spins. The ground state is substantially different from the magnetic polaron formed by an electron.