Opening book details…
Can I read Self-consistent cluster CPA methods and the nested CPA theory on EtoBox?
Self-consistent cluster CPA methods and the nested CPA theory by C.I Ventura; R.A Barrio is a Physics and Astronomy article available to read on EtoBox.
What is Self-consistent cluster CPA methods and the nested CPA theory about?
The coherent potential approximation (CPA), is a useful tool to treat systems with disorder. Cluster theories have been proposed to go beyond the translation invariant single-site CPA approximation and include some short-range correlations. In this framework one can also treat simultaneously diagonal disorder (in the site-diagonal elements of the Hamiltonian) and non-diagonal disorder (in the bond energies). It proves di$cult to obtain reasonable results, free of non-analyticities, for lattices of dimension higher than one (D'1). We show electronic structure results obtained for a Hubbard model, treated in mean-"eld approximation, on a square lattice and a simple cubic lattice, with the simultaneous inclusion of diagonal and non-diagonal disorder. We compare the results obtained using three di!erent methods to treat the problem: a self-consistent 2-site cluster CPA method, the Blackman}Esterling}Berk single-site like extension of the CPA and a nested CPA approach.
Who reads Self-consistent cluster CPA methods and the nested CPA theory?
It is typically read by researchers, students, and practitioners in Physics and Astronomy.
- Author
- C.I Ventura; R.A Barrio
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0921-4526)
- Published
- 2000
- Language
- EN
- Field
- Physics and Astronomy (Physical Sciences)