ZERO-TEMPERATURE PHASE-DIAGRAM OF THE ONE-DIMENSIONAL T-J MODEL

被引：3
|
作者：
HELLBERG, CS [1 ]
MELE, EJ [1 ]
机构：
[1] UNIV PENN,DEPT PHYS,PHILADELPHIA,PA 19104
来源：
PHYSICA B | 1994年 / 199卷
关键词：
D O I：
10.1016/0921-4526(94)91823-6
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We study the t-J model in one dimension by combining a variational approach and an exact ground-state projection method. We find that the model exhibits Luttinger-liquid behavior for most of the phase diagram before the critical J/t for phase separation. However, at small densities and high interaction strengths, a new Luther-Emery-liquid phase with a gap to spin excitations and enhanced superconducting correlations is found.
引用
收藏
页码：322 / 324
页数：3
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