207 citations · 2.5k across the 69 of their papers we have counts for
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Excitation spectrum and ground state properties of the S=1/2 Heisenberg ladder with staggered dimerization
V. N. Kotov, J. Oitmaa, Zheng Weihong
We have studied the excitation spectrum of the quantum spin ladder with staggered dimerization by dimer series expansions, diagrammatic analysis of an effective interacting…
Various series expansions for a Heisenberg antiferromagnet model for SrCu(BO)
Zheng Weihong, C. J. Hamer, J. Oitmaa
We use a variety of series expansion methods at both zero and finite temperature to study an antiferromagnetic Heisenberg spin model proposed recently by Miyahara and Ueda for the…
Meta-Plaquette Expansion for the Triplet Excitation Spectrum in CaVO
Zheng Weihong, J. Oitmaa, C. J. Hamer
We study antiferromagnetic, Heisenberg models with nearest and second neighbor interactions on the one-fifth depleted square lattice which describes the spin degrees of fre…
Studies of one- and two-hole states in the 2D t-J model via series expansions
C. J. Hamer, Zheng Weihong, J. Oitmaa
We study one and two hole properties of the t-J model at half-filling on the square lattice using series expansion methods at T=0. The dispersion curve for one hole excitations is…
Magnetic Impurity in the two-dimensional Heisenberg Antiferromagnet
V. N. Kotov, J. Oitmaa, O. Sushkov
We analyze the ground state properties of the two-dimensional quantum antiferromagnet with a S=1/2 Kondo impurity. Perturbation theory around the strong Kondo coupling limit is dev…