Impurity systems fluctuating between two magnetic configurations: candidates for non Fermi-liquid behavior

Дата и время публикации : 1993-04-29T09:33:00Z

Авторы публикации и институты :
A. A. Aligia
M. Balina

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 12 pages,REVTEX,no figures,CNEA-CAB-3027
Первичная категория: cond-mat

Все категории : cond-mat

Краткий обзор статьи: The appropriate generalization of the isotropic impurity Anderson model for valence fluctuations between two magnetic multiplets $l^n$ and $l^{n+1}$ is solved in the strong-coupling limit of Wilson’s renormalization group for $lleq$ 3. Except in the extreme case of $j-j$ coupling, the ground state is degenerate, the impurity magnetic moment is very small and is overscreened by the conduction electrons. The strong-coupling fixed point turns out to be unstable. Thus, at low enough temperatures the physics of the systems should be governed by an intermediate coupling fixed point and non Fermi-liquid behavior is expected.

Category: Physics