Investigation of the nonlocal coherent-potential approximation

Abstract

Recently the nonlocal coherent-potential approximation (NLCPA) has been introduced by Jarrell and Krishnamurthy for describing the electronic structure of substitutionally disordered systems. The NLCPA provides systematic corrections to the widely used coherent-potential approximation (CPA) whilst preserving the full symmetry of the underlying lattice. Here an analytical and systematic numerical study of the NLCPA is presented for a one-dimensional tight-binding model Hamiltonian, and comparisons with the embedded cluster method (ECM) and molecular coherent potential approximation (MCPA) are made.

arXiv comment18 pages, 5 figures

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Cited by in corpus (7)

• Electronic transport in ferromagnetic alloys and the Slater-Pauling Curve
• Coherent potential approximation for spatially correlated disorder
• Typical-medium, multiple-scattering theory for disordered systems with Anderson localization
• Nonlocal spectral properties of disordered alloys
• Inclusion of intersite spatial correlations in the alloy analogy approach to the half-filled ionic Hubbard model
• Dynamical nonlocal coherent-potential approximation for itinerant electron magnetism
• Coherent cellular dynamical mean-field theory: a real-space quantum embedding approach to disorder in strongly correlated electron systems