179 citations · 2.1k across the 56 of their papers we have counts for
5 papers · 1 filter
Fractional charges and spin-charge separation in one-dimensional Wigner lattices
M. Daghofer, P. Horsch
We study density response N(k,omega) and one-particle spectra A(k,omega) for a Wigner lattice model at quarter filling using exact diagonalization. We investigate these observables…
Magnetic properties of spin-orbital polarons in lightly doped cobaltates
M. Daghofer, P. Horsch, G. Khaliullin
We present a numerical treatment of a spin-orbital polaron model for Na_xCoO_2 at small hole concentration (0.7 < x < 1). We demonstrate how the polarons account for the peculiar m…
Spin-Orbital Entanglement and Violation of the Goodenough-Kanamori Rules
Andrzej M. Oles, Peter Horsch, Louis Felix Feiner +1
We point out that large composite spin-orbital fluctuations in Mott insulators with orbital degeneracy are a manifestation of quantum entanglement of spin and orbital vari…
Domain-wall excitons and optical conductivity in one-dimensional Wigner lattices
Matthias Mayr, Peter Horsch
Motivated by the recent finding that doped edge-sharing Cu-O chain compounds like NaCuO and NaCuO are realizations of one-dimensional Wigner crystals, we…
Fingerprints of spin-orbital physics in cubic Mott insulators: Magnetic exchange interactions and optical spectral weights
Andrzej M. Oles, Giniyat Khaliullin, Peter Horsch +1
The temperature dependence and anisotropy of optical spectral weights associated with different multiplet transitions is determined by the spin and orbital correlations. To provide…