LUTTINGER LIQUID INSTABILITY OF THE 2D T-J MODEL - A VARIATIONAL STUDY

被引：68

作者：

VALENTI, R

GROS, C

机构：

[1] Institut für Physik, Universität Dortmund, 4600 Dortmund 50

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.68.2402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study variationally the possible occurrence of a Luttinger liquid in the normal state of the 2D t-J model. For this, we generalize to 2D a Luttinger - Jastrow - Gutzwiller-type wave function introduced by Hellberg and Mele for the 1D t-J model. We show that this wave function does show also in 2D the characteristic correlations of a Luttinger liquid and that gains in kinetic energy stabilize the Luttinger liquid state with respect to Fermi liquid states with short-range correlations only. In addition, we provide rigorous lower bounds to the transition to the fully phase-separated state at larger ratios J/t.

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页码：2402 / 2405

页数：4

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