207 citations · 2.5k across the 69 of their papers we have counts for
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Further Series Studies of the Spin-1/2 Heisenberg Antiferromagnet at T=0: Magnon Dispersion and Structure Factors
Weihong Zheng, J. Oitmaa, C. J. Hamer
We have extended our previous series studies of quantum antiferromagnets at zero temperature by computing the one-magnon dispersion curves and various structure factors for the lin…
Curie and Neel Temperatures of Quantum Magnets
J. Oitmaa, Weihong Zheng
We estimate, using high-temperature series expansions, the transition temperatures of the spin 1/2, 1 and 3/2 Heisenberg ferromagnet and antiferromagnet in 3-dimensions. The manner…
Thermodynamics of a Spin-1/2 Chain Coupled to Einstein Phonons
Alexander Bühler, Götz S. Uhrig, Jaan Oitmaa
A high order series expansion is employed to study the thermodynamical properties of a S=1/2 chain coupled to dispersionless phonons. The results are obtained without truncating th…
Ground state and finite temperature signatures of quantum phase transitions in the half-filled Hubbard model on a honeycomb lattice
Thereza Paiva, R. T. Scalettar, W. Zheng +2
We investigate ground state and finite temperature properties of the half-filled Hubbard model on a honeycomb lattice using quantum monte carlo and series expansion techniques. Unl…
Order and disorder in the triangular-lattice t-J-V model at 2/3 electron density
W. Zheng, J. Oitmaa, C. J. Hamer +1
Motivated by the recent discovery of superconductivity in NaCoOHO, we use series expansion methods and cluster mean-field theory to study spontaneous charge orde…