77 citations · 192 across the 8 of their papers we have counts for
8 papers
Dynamical nonlocal coherent-potential approximation for itinerant electron magnetism
D. A. Rowlands, Yu-Zhong Zhang
A dynamical generalisation of the nonlocal coherent-potential approximation is derived based upon the functional integral approach to the interacting electron problem. The free ene…
Inclusion of intersite spatial correlations in the alloy analogy approach to the half-filled ionic Hubbard model
D. A. Rowlands, Yu-Zhong Zhang
Using the nonlocal coherent-potential approximation we study the effect of intersite spatial correlations on the transition from band insulator to metal as well as from metal to Mo…
Momentum-dependent local ansatz approach to correlated electrons
Yoshiro Kakehashi, Sumal Chandra, Derwyn Rowlands +1
The wavefunction method provides us with a useful tool to describe electron correlations in solids at the ground state. In this paper we review the recent development of the moment…
Disappearance of the Dirac cone in silicene due to the presence of an electric field
D. A. Rowlands, Yu-Zhong Zhang
Using the two-dimensional ionic Hubbard model as a simple basis for describing the electronic structure of silicene in the presence of an electric field induced by the substrate, w…
Nonlocal spectral properties of disordered alloys
G. M. Batt, D. A. Rowlands
A general method is proposed for calculating a fully k-dependent, continuous, and causal spectral function A(k,E) within the recently introduced nonlocal version of the coherent-po…
Investigation of the nonlocal coherent-potential approximation
D. A. Rowlands
Recently the nonlocal coherent-potential approximation (NLCPA) has been introduced by Jarrell and Krishnamurthy for describing the electronic structure of substitutionally disorder…