RKKY interactions and the Mott transition

Article

关键词: LOW-TEMPERATURE PROPERTIES;    D = INFINITY;    HUBBARD-MODEL;    FERMI-LIQUID;    CORRELATED FERMIONS;    HIGH DIMENSIONS;    MONTE-CARLO;    D=INFINITY;    SYSTEMS;    LATTICE;   

DOI  :  10.1103/PhysRevB.59.6846

来源: SCIE

【 摘 要 】

A two-site cluster generalization of the Hubbard model in large dimensions is examined in order to study the role of short-range spin correlations near the metal-insulator transition (MIT). The model is mapped to a two-impurity Kondo-Anderson model in a self-consistently determined bath, making it possible to directly address the competition between the Kondo effect and Ruderman-Kittel-Kasuya-Yosida (RKKY) interactions in a lattice context. Our results indicate that the RKKY interactions lead to qualitative modifications of the MIT scenario even in the absence of long-range antiferromagnetic ordering. [S0163-1829(99)07809-1].

【 授权许可】

Free