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

被引：301

作者：

OGATA, M ^{[1
]}

LUCHINI, MU ^{[1
]}

SORELLA, S ^{[1
]}

ASSAAD, FF ^{[1
]}

机构：

[1] SWISS FED INST TECHNOL,INTERDISZIPLINARES PROJEKTZENTRUM SUPERCOMP,CH-8092 ZURICH,SWITZERLAND

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.66.2388

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The phase diagram of the one-dimensional t-J model is investigated by analyzing the results of exact diagonalization and the exact solutions at J/t = 0 and 2. Phase separation takes place above a critical value of J around J(c)/t = 2.5-3.5 depending on the electron density. In the small-J region, Tomonaga-Luttinger liquid theory holds and its correlation exponents are calculated as a function of J/t and the electron density. Superconducting correlations become dominant in a region between the solvable case (J/t = 2) and phase separation. A spin-gap region is also found at low density.

引用

页码：2388 / 2391

页数：4

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