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Coherent potential approximation
About: Coherent potential approximation is a research topic. Over the lifetime, 1930 publications have been published within this topic receiving 36805 citations.
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TL;DR: In this article, a mixed Jaggregate consisting of 5,5′-dichloro-3,3′-dimethyl-9-phenyl-4,5,4′, 5′-naphthothiacarbocyanine chloride is proposed.
1 citations
TL;DR: In this article, a promising approach has been found in using the non-equilibrium Green functions approximately factorized on the basis of the so-called generalized Kadanoff-Baym ansatz.
Abstract: The new experiments on the response of electrons in semiconductors to femtosecond optical pulses call for developing adequate theoretical tools. A promising approach has been found in using the non-equilibrium Green functions approximately factorized on the basis of the so-called generalized Kadanoff—Baym ansatz. The present work investigates the validity of such approach on an example of a semiconductor with an alloy scattering, where the coherent potential approximation allows to construct the non-equilibrium Green functions directly, so that an explicit comparison with the ansatz decoupling is possible. The ansatz for the electron distribution is in this case justified as far as the quasiparticle picture for the individual electrons is appropriate.
1 citations
TL;DR: In this paper, the vibrational density of states is found analytically for low energy and disorder, and numerically otherwise, and these results are supported by precise numerical calculation using the kernel polynomial method.
Abstract: Lattices with force-constant disorder are good model systems for studying vibrational excitations in disordered materials. Here, we investigate vibrations in a 2D square lattice, with anisotropic force-constant disorder, using the coherent potential approximation. The vibrational density of states is found analytically for low energy and disorder, and numerically otherwise, and these results are supported by precise numerical calculation using the kernel polynomial method.
1 citations
1 citations
TL;DR: In this article, the density of states, dynamic magnetic susceptibility, and the dynamic electric conductivity of the periodic Anderson model have been investigated using the coherent potential approximation combining with the functional integral method.
Abstract: The density of states, dynamic magnetic susceptibility, and the dynamic electric conductivity of the periodic Anderson model have been investigated using the coherent potential approximation combining with the functional integral method. In the case of particle-hole symmetry, the density of states (DOS's) at about Fermi energy have strong temperature dependence, and there are gaps in the DOS's of the two kinds of electrons. Our theoretic results of the dynamic magnetic susceptibility and the dynamic electric conductivity are in accordance with some experiments on Kondo insulators.
1 citations