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…
Phase Diagram of the Spin-Orbital model on the Square Lattice
E. Zasinas, O. P. Sushkov, J. Oitmaa
We study the phase diagram of the spin-orbital model in both the weak and strong limits of the quartic spin-orbital exchange interaction. This allows us to study quantum phase tran…
Studies of a 2-Chain Spin Ladder with Frustrating Second Neighbor Interactions
Zheng Weihong, V. Kotov, J. Oitmaa
The Heisenberg model on a 2-chain spin-1/2 ladder with frustrating second neighbor interactions is studied by using series expansions about the Ising and dimer limits, numerical di…
Spin-S bilayer Heisenberg models: Mean-field arguments and numerical calculations
Martin P. Gelfand, Zheng Weihong, C. J. Hamer +1
Spin-S bilayer Heisenberg models (nearest-neighbor square lattice antiferromagnets in each layer, with antiferromagnetic interlayer couplings) are treated using dimer mean-field th…