Nonlocal spectral properties of disordered alloys
Materials Science
2009-11-11 v1
Abstract
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-potential approximation (NLCPA). The method involves the combination of both periodic and anti-periodic solutions to the associated cluster problem and also leads to correct bulk quantities for small cluster sizes. We illustrate the method by investigating the Fermi surface of a two-dimensional alloy. Dramatically, we find a smeared electronic topological transition not predicted by the conventional CPA.
Keywords
Cite
@article{arxiv.cond-mat/0610208,
title = {Nonlocal spectral properties of disordered alloys},
author = {G. M. Batt and D. A. Rowlands},
journal= {arXiv preprint arXiv:cond-mat/0610208},
year = {2009}
}
Comments
17 pages, 5 figures, Submitted to: J. Phys.: Condens. Matter Editorial receipt 25 May 2006