92 citations · 1.2k across the 70 of their papers we have counts for
5 papers · 1 filter
Mechanism of hole propagation in the orbital compass models
Wojciech Brzezicki, Maria Daghofer, Andrzej M. Oleś
We explore the propagation of a single hole in the quantum compass model, whose nematic ground state is given by mutually decoupled antiferromagnetic chains. The compass model can…
Exact spectral function for hole-magnon coupling in the ferromagnetic CuO-like chain
Krzysztof Bieniasz, Andrzej M. Oleś
We present the exact spectral function for a single oxygen hole with spin opposite to ferromagnetic order within a one-dimensional CuO-like spin chain. We find that local Kon…
Symmetry properties and spectra of the two-dimensional quantum compass model
Wojciech Brzezicki, Andrzej M. Oleś
We use exact symmetry properties of the two-dimensional quantum compass model to derive nonequivalent invariant subspaces in the energy spectra of clusters up to L=6. T…
Strong Effects of Cation Vacancies on the Electronic and Dynamical Properties of FeO
Urszula D. Wdowik, Przemysław Piekarz, Krzysztof Parlinski +2
We report pronounced modifications of electronic and vibrational properties induced in FeO by cation vacancies, obtained within density functional theory incorporating strong local…
Exotic spin orders driven by orbital fluctuations in the Kugel-Khomskii model
Wojciech Brzezicki, Jacek Dziarmaga, Andrzej M. Oleś
We study zero temperature phase diagram of the three-dimensional Kugel-Khomskii model on a cubic lattice using the cluster mean field theory and different perturbative expansions i…