226 citations · 716 across the 17 of their papers we have counts for
17 papers
Critiquing Variational Theories of the Anderson-Hubbard Model: Real-Space Self-Consistent Hartree-Fock Solutions
X. Chen, A. Farhoodfar, T. McIntosh +2
A simple and commonly employed approximate technique with which one can examine spatially disordered systems when strong electronic correlations are present is based on the use of…
Quantum phase transition induced by Dzyaloshinskii-Moriya in the kagome antiferromagnet
O. Cepas, C. M. Fong, P. W. Leung +1
We argue that the S=1/2 kagome antiferromagnet undergoes a quantum phase transition when the Dzyaloshinskii-Moriya coupling is increased. For the system is in a moment-free…
Exact diagonalization analysis of the Anderson-Hubbard model and comparison to real-space self-consistent Hartree-Fock solutions
X. Chen, P. W. Leung, R. J. Gooding
We have obtained the exact ground state wave functions of the Anderson-Hubbard model for different electron fillings on a 4x4 lattice with periodic boundary conditions - for 1/2 fi…
Magnon Dispersion and Anisotropies in SrCu(BO)
Y. F. Cheng, O. Cepas, P. W. Leung +1
We study the dispersion of the magnons (triplet states) in SrCu(BO) including all symmetry-allowed Dzyaloshinskii-Moriya interactions. We can reduce the complexity of t…
Hole correlation and antiferromagnetic order in the t-J model
P. W. Leung
We study the t-J model with four holes on a 32-site square lattice using exact diagonalization. This system corresponds to doping level x=1/8. At the ``realistic'' parameter J/t=0.…
Charge carrier correlation in the electron-doped t-J model
P. W. Leung
We study the t-t'-t''-J model with parameters chosen to model an electron-doped high temperature superconductor. The model with one, two and four charge carriers is solved on a 32-…