Ground State of a Magnetic Impurity in a Metal

作者：Philip Warren Anderson · 发表于：Physical Review · 年份：1967 · DOI：10.1103/physrev.164.352 · 被引用次数：244 · 研究领域：Physics of Superconductivity and Magnetism、Quantum and electron transport phenomena、Magnetic properties of thin films

A new type of ground-state wave function for a magnetic impurity in a metal is postulated, and its parameters are determined variationally. The basic idea is that formation of a singlet ground state requires the phase shifts of all electrons near the Fermi surface to be adjusted simultaneously. The method resembles a configuration-interaction treatment of in-out correlation. The result is a phase shift which varies as ${(E\ensuremath{-}{E}_{F})}^{\frac{1}{2}}$ near the Fermi surface and a binding energy larger than in previous variational treatments.