274 citations · 1.3k across the 12 of their papers we have counts for
12 papers
Orbital liquid in the orbital Hubbard model in dimensions
Louis Felix Feiner, Andrzej M. Oleś
We demonstrate that the three-dimensional orbital Hubbard model can be generalized to arbitrary dimension , and that the form of the result is determined uniquely by the r…
Evolution of Spin-Orbital-Lattice Coupling in the VO Perovskites
Peter Horsch, Andrzej M. Oles', Louis Felix Feiner +1
We introduce a microscopic model which unravels the physical mechanisms responsible for the observed phase diagram of the VO perovskites. It reveals a nontrivial interplay b…
Orbital liquid in ferromagnetic manganites: The orbital Hubbard model for electrons
Louis Felix Feiner, Andrzej M. Oles
We have analyzed the symmetry properties and the ground state of an orbital Hubbard model with two orbital flavors, describing a partly filled spin-polarized band on a cubic…
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…
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…
Orbital and spin physics in LiNiO2 and NaNiO2
Albert J. W. Reitsma, Louis F. Feiner, Andrzej M. Oles'
We derive a spin-orbital Hamiltonian for a triangular lattice of e_g orbital degenerate (Ni^{3+}) transition metal ions interacting via 90 degree superexchange involving (O^{2-}) a…