FERROMAGNETISM IN HUBBARD MODELS

被引：126

作者：

TASAKI, H

机构：

[1] Department of Physics, Gakushuin University, Mejiro, Toshima-ku

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.75.4678

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first rigorous examples of nonsingular Hubbard models which exhibit ferromagnetism at zero temperature. The models are defined in arbitrary dimensions, and are characterized by finite-range hoppings, dispersive bands, and finite on-site Coulomb interaction U. The picture, which goes back to Heisenberg, that sufficiently large Coulomb interaction can revert Pauli paramagnetism into ferromagnetism has been confirmed in concrete examples.

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页码：4678 / 4681

页数：4

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