207 citations · 2.5k across the 69 of their papers we have counts for
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cond-mat.str-el2003★ 56 cited
A closer look at symmetry breaking in the collinear phase of the Heisenberg Model
R. R. P. Singh, W. Zheng, J. Oitmaa +2
The large limit of the square-lattice Heisenberg antiferromagnet is a classic example of order by disorder where quantum fluctuations select a collinear ground stat…
cond-mat.str-el2003
The Mixed Spin S=(1/2,1) XXZ Ferrimagnet at Zero Temperature
Weihong Zheng, J. Oitmaa
Linked cluster series expansions about the Ising limit are used to study ground state preperties, viz. ground state energy, magnetization and excitation spectra, for mixed spin S=(…