92 citations · 1.2k across the 70 of their papers we have counts for
8 papers · 1 filter
Spin-orbital order in undoped manganite LaMnO3 at finite temperature
Mateusz Snamina, Andrzej M. Oleś
We investigate the evolution of spin and orbital order in undoped LaMnO under increasing temperature with a model including both superexchange and Jahn-Teller interactions. We…
Green's function variational approach to orbital polarons in KCuF3
Krzysztof Bieniasz, Mona Berciu, Maria Daghofer +1
We develop an orbital, --like model of a single charge doped into a two-dimensional plane with ferromagnetic spin order and alternating orbital order, and present its s…
The Green function variational approximation: Significance of physical constraints
Krzysztof Bieniasz, Mona Berciu, Andrzej M. Oleś
We present a calculation of the spectral properties of a single charge doped at a Cu() site of the Cu-F plane in KCuF. The problem is treated by generating the equations…
Electronic properties in a quantum well structure of Weyl semimetal
Wen-Long You, Xue-Feng Wang, Andrzej M. Oleś +1
We investigate the confined states and transport of three-dimensional Weyl electrons around a one-dimensional external rectangular electrostatic potential. Confined states with fin…
Phase diagram and spin correlations of the Kitaev-Heisenberg model: Importance of quantum effects
Dorota Gotfryd, Juraj Rusnačko, Krzysztof Wohlfeld +3
We explore the phase diagram of the Kitaev-Heisenberg model with nearest neighbor interactions on the honeycomb lattice using the exact diagonalization of finite systems combined w…
Quantum phase transitions in a generalized compass chain with three-site interactions
Wen-Long You, Yu-Cheng Qiu, Andrzej M. Oleś
We consider a class of one-dimensional compass models with XYZYZX-type of three-site exchange interaction in an external magnetic field. We present the exact solution derived by…