Topic
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, the spin wave stiffness constant in NiCu alloys is calculated in the RPA and cluster coherent potential approximation, and it is shown that the stiffness constant decreases when the concentration of Cu increases.
Abstract: The spin wave stiffness constant in NiCu alloys is calculated in the RPA and cluster coherent potential approximation. It is shown that the stiffness constant D decreases when the concentration of Cu increases.
Die Spinwellensteifigkeitskonstante wird in der RPA und Cluster-CPA berechnet. Die Steifigkeitskostante D nimmt ab, wenn die Cu-Konzentration wachst.
4 citations
TL;DR: In this paper, the authors proposed a minimal model, which is composed of a single tight-binding band of carriers and magnetic impurities, which randomly substitute the host sites and applied the coherent potential approximation in studying this system.
4 citations
TL;DR: In this paper, the change in the electronic structure of titanium monoxide Ti5O5 ordered according to a monoclinic superstructure is studied as a function of the degree of vacancy ordering in the titanium and oxygen sublattices.
Abstract: An idea is formulated and implemented to take into account the change in the electrostatic interaction between lattice sites when vacancies substitute for atoms using the coherent potential approximation in the calculation method proposed by us earlier [3]. The change in the electronic structure of titanium monoxide Ti5O5 ordered according to a monoclinic superstructure is studied as a function of the degree of vacancy ordering in the titanium and oxygen sublattices.
4 citations
TL;DR: In this paper, the electronic structure and residual resistivity of random FeRh-based alloys in the CsCl structure are calculated for different spin configurations using the tight-binding linear muffin-tin orbital method.
4 citations
TL;DR: In this paper, the effects of relativistic effects on the electronic structure of ordered and substitutionally disordered Ni-Pt alloys were studied using the atomic-sphere approximation formulation of the KCR CPA.
Abstract: Using the atomic-sphere approximation formulation of the Korringa-Kohn-Rostoker coherent potential approximation (KKR CPA) method, we have studied the effects of relativity on the electronic structure of ordered and substitutionally disordered Ni-Pt alloys. The inclusion of mass-velocity and Darwin terms are found to be essential for describing the experimentally observed ground-state properties. For the stability of disordered Ni-Pt alloys we find that, in addition to relativity, the minimization of charge-transfer effects are important. We also find that the treatment of ordering tendencies based on the band energy term alone is not sufficiently accurate for alloys with charge-transfer effects. Further analysis, in terms of basis functions, densities of states and non-spherically averaged charge densities, indicate the importance ofs- andd-electrons of Pt for the stability of both ordered and disordered Ni-Pt alloys.
4 citations