226 citations · 234 across the 4 of their papers we have counts for
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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…
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-…
Absence of hole pairing in a simple t-J model on the Shastry-Sutherland lattice
P. W. Leung, Y. F. Cheng
The Shastry-Sutherland model is a two-dimensional frustrated spin model whose ground state is a spin gap state. We study this model doped with one and two holes on a 32-site lattic…