The RKKY interactions and the Mott Transition

Abstract

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 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.

10 pages, 10 figures; to appear in Phys. Rev. B (1999)

References in corpus (1)

• Nonlocal Dynamical Correlations of Strongly Interacting Electron Systems

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