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cond-mat.str-el2019
The internal energies of Heisenberg magnetic systems
Huai-Yu Wang, Liang-Jun Zhai, Meichun Qian
The internal energies, including transverse and longitudinal parts, of quantum Heisenberg systems for arbitrary spin S are investigated by the double-time Green's function method.…
cond-mat.str-el2019
The Phase Transition of Square Lattice Antiferromagnets at Finite Temperature
Huai-Yu Wang
The magnetic properties of the two-dimensional model with both exchanges and being antiferromagnetic and a single-ion anisotropy at nonzero temperatur…