INSTABILITIES OF ANISOTROPIC INTERACTING FERMI SYSTEMS

被引：59

作者：

CASTELLANI, C

DICASTRO, C

METZNER, W

机构：

[1] Dipartimento di Fisica, Università La Sapienza, 00185 Roma

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.69.1703

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We analyze interacting lattice fermions with anisotropic hopping amplitudes. Calculating the linear response of the momentum distribution function, we find that one-dimensional Luttinger liquid phases are unstable with respect to arbitrarily small transverse hopping, even if the interaction is strong. This instability is expected to signal the formation of states with broken symmetry in the strongly anisotropic regime.

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页码：1703 / 1706

页数：4

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