Compact approximate solution to the Friedel-Anderson impurity problem

Article

关键词: DILUTE MAGNETIC-ALLOYS;    RENORMALIZATION-GROUP APPROACH;    HEAVY-FERMION SYSTEMS;    KONDO PROBLEM;    STATIC PROPERTIES;    LOW-TEMPERATURES;    LOCAL MOMENTS;    GROUND-STATE;    CE COMPOUNDS;    LARGE-N;   

DOI  :  10.1103/PhysRevB.74.144420

来源: SCIE

【 摘 要 】

An approximate ground state of the Anderson-Friedel impurity problem is presented in a very compact form. It requires solely the optimization of two localized electron states and consists of four Slater states (Slater determinants). The resulting singlet ground-state energy lies far below the Anderson mean-field solution and agrees well with the numerical results by Gunnarsson and Schonhammer, who used an extensive 1/N-f expansion for a spin-1/2 impurity with double occupancy of the impurity level.

【 授权许可】

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