The RKKY interactions and the Mott Transition

Дата и время публикации : 1998-12-11T00:49:45Z

Авторы публикации и институты :
G. Moeller
V. Dobrosavljevic
A. E. Ruckenstein

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 10 pages, 10 figures; to appear in Phys. Rev. B (1999)
Первичная категория: cond-mat.str-el

Все категории : cond-mat.str-el, cond-mat.stat-mech

Краткий обзор статьи: 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.

Category: Physics