Effective-medium approximation for liquid metals

作者：Laura M. Roth · 发表于：Physical review. B, Solid state · 年份：1974 · DOI：10.1103/physrevb.9.2476 · 被引用次数：146 · 研究领域：Thermodynamic and Structural Properties of Metals and Alloys、Advanced Chemical Physics Studies、Surface and Thin Film Phenomena

An effective-medium theory is developed for the electronic structure of liquid metals. The medium is characterized by a medium site-site scattering matrix and a medium intersite propagator. These are self-consistently determined by removing an ion from the medium and then examining the scattering from that ion. To third order in the $T$-matrix expansion, the result corresponds to evaluating the three-particle distribution function in the superposition approximation, and this is more accurate than previous work. The result reduces to the coherent-potential approximation for the case of binary alloys. A tight-binding-model version of the theory is also discussed.