207 citations · 2.6k across the 59 of their papers we have counts for
59 papers
Excitation spectra and ground state properties of the layered spin-1/2 frustrated antiferromagnets Cs_2CuCl_4 and Cs_2CuBr_4
John O. Fjaerestad, Weihong Zheng, Rajiv R. P. Singh +2
We use series expansion methods to study ground- and excited-state properties in the helically ordered phase of spin-1/2 frustrated antiferromagnets on an anisotropic triangular la…
Excitation spectra of the spin-1/2 triangular-lattice Heisenberg antiferromagnet
Weihong Zheng, John O. Fjaerestad, Rajiv R. P. Singh +2
We use series expansion methods to calculate the dispersion relation of the one-magnon excitations for the spin-1/2 triangular-lattice nearest-neighbor Heisenberg antiferromagnet a…
Critical Behaviour of One-particle Spectral Weights in the Transverse Ising Model
C. J. Hamer, J. Oitmaa, Weihong Zheng +1
We investigate the critical behaviour of the spectral weight of a single quasiparticle, one of the key observables in experiment, for the particular case of the transverse Ising mo…
Crossover of spectral features from Dimerized to Haldane behavior in alternating antiferromagnetic-ferromagnetic spin-half chains
Weihong Zheng, Chris Hamer, Rajiv Singh
We calculate the excitation spectrum and spectral weights of the alternating antiferromagnetic-ferromagnetic spin-half Heisenberg chain with exchange couplings and as a…
Single-hole properties of the t-J model on the honeycomb lattice
Andreas Luscher, Andreas Laeuchli, Weihong Zheng +1
Motivated by the possible charge ordering in the recently discovered superconductor Na_xCoO_2 yH_2O, which at filling x=1/3 would correspond to a half-filled honeycomb lattice, we…
The t-Jz ladder
A. Weisse, R. J. Bursill, C. J. Hamer +1
The phase diagram of the two-leg t-Jz ladder is explored, using the density matrix renormalization group method. Results are obtained for energy gaps, electron density profiles and…