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4 papers · 2 filters
Finite f-Electron Bandwidth in a Heavy Fermion Model
Axel Euverte, Simone Chiesa, Richard T. Scalettar +1
Determinant Quantum Monte Carlo (DQMC) is used to study the effect of non-zero hopping t_f in the localized f-band of the periodic Anderson model (PAM) in two dimensions. The low t…
Anisotropic Infrared Response of Vanadium Dioxide Microcrystals
T. J. Huffman, Peng Xu, M. M. Qazilbash +8
Vanadium dioxide (VO2) undergoes a phase transition at a temperature of 340 K between an insulating monoclinic M1 phase and a conducting rutile phase. Accurate measurements of poss…
Symmetry in Auxiliary-Field Quantum Monte Carlo Calculations
Hao Shi, Shiwei Zhang
We show how symmetry properties can be used to greatly increase the accuracy and efficiency in auxiliary-field quantum Monte Carlo (AFQMC) calculations of electronic systems. With…
Magnetic order in the repulsive Fermi-Hubbard model in three-dimensions and the crossover to two-dimensions
Jie Xu, Simone Chiesa, Eric J. Walter +1
Systems of fermions described by the three-dimensional (3D) repulsive Hubbard model on a cubic lattice have recently attracted considerable attention due to their possible experime…