Polaron states in a CuO chain

Abstract

We introduce a one-dimensional model for a CuO chain, with holes and $S=1/2$ spins localized in $3d_{x^2-y^2}$ orbitals, and $p_{\sigma }$ oxygen orbitals without holes in the ground state. We consider a single hole doped at an oxygen site and study its propagation by spin-flip processes. We develop the Green's function method and treat the hole-spin coupling in the self-consistent Born approximation, similar to that successfully used to study polarons in the regular $t$-$J$ model. We present an analytical solution of the problem and investigate whether the numerical integration is a good approximation to this solution.

3 pages, 2 figures, Physics of Magnetism, Poznań 2014

References in corpus (4)

• Absence of Hole Confinement in Transition Metal Oxides with Orbital Degeneracy
• Phase diagram and single-particle spectrum of CuO${}_2$ layers within a variational cluster approach to the 3-band Hubbard model
• Ferro-Orbitally Ordered Stripes in Systems with Alternating Orbital Order
• Hole propagation in the orbital compass models