Orbiton-magnon interplay in the spin-orbital polarons of KCuF3 and LaMnO3

Krzysztof Bieniasz, Mona Berciu, Andrzej M. Oleś

We present a quasi-analytical solution of a spin-orbital model of KCuF${}_3$, using the variational method for Green's functions. By analyzing the spectra for different partial bos…