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99 papers · 2 filters
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…
Dynamical thermalization in isolated quantum dots and black holes
Andrey R. Kolovsky, Dima L. Shepelyansky
We study numerically a model of quantum dot with interacting fermions. At strong interactions with small conductance the model is reduced to the Sachdev-Ye-Kitaev black hole model…
Pressuring the low-temperature orthorhombic phase with a non-trivial topological state of Ru2Sn3 to room temperature
Shan Zhang, Q. D. Gibson, Wei Yi +11
We report high pressure studies of the structural stability of Ru2Sn3, a new type of three dimensional topological insulator (3D-TI) with unique quasi-one dimensional Dirac electro…
Self-Learning Determinantal Quantum Monte Carlo Method
Xiao Yan Xu, Yang Qi, Junwei Liu +2
Self-learning Monte Carlo method [arXiv:1610.03137, 1611.09364] is a powerful general-purpose numerical method recently introduced to simulate many-body systems. In this work, we i…