ELECTRON CORRELATIONS, MAGNETISM, AND STRUCTURE OF SMALL CLUSTERS

被引：62

作者：

PASTOR, GM

HIRSCH, R

MUHLSCHLEGEL, B

机构：

[1] Institut für Theoretische Physik, Universität zu Köln, 50937 Köln

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.72.3879

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Many-body properties of N-atom clusters having N less-than-or-equal-to 8 are calculated exactly in the framework of the Hubbard model for all possible nonequivalent cluster structures. The most stable structure and the corresponding total spin S are obtained rigorously as a function of the Coulomb-interaction strength U/t and the number of electrons. Results for the stability of cluster ferromagnetism against electronic excitations and structural changes are obtained for the first time. The resulting interplay between electron correlations, magnetism, and cluster structure is determined.

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页码：3879 / 3882

页数：4

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