207 citations · 2.5k across the 69 of their papers we have counts for
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Phase Diagram of the BCC S=1/2 Heisenberg Antiferromagnet with First and Second Neighbor Exchange
Jaan Oitmaa, Weihong Zheng
We use linked-cluster series expansions, both at T=0 and high temperature, to analyse the phase structure of the spin-$\half$ Heisenberg antiferromagnet with competing first and se…
Ferrimagnetism and compensation points in a decorated 3D Ising models
J. Oitmaa, W. Zheng
We give a precise numerical solution for decorated Ising models on the simple cubic lattice which show ferromagnetism, compensation points, and reentrant behaviour. The models, con…
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…
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=(…