DIMER STATES IN THE ONE-DIMENSIONAL T-J-J' MODEL

被引：9

作者：

TAKANO, K

SANO, K

机构：

[1] MIE UNIV,FAC EDUC,TSU,MIE 514,JAPAN

[2] NAGOYA UNIV,DEPT PHYS,NAGOYA 46401,JAPAN

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.48.9831

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We introduced variational wave functions to describe dimer states in the one-dimensional t-J-J' model, when one hole is doped and J' = J/2. For finite J/Absolute value of t in the first excited state with S = 1, there exists a bound state of the hole and an unpaired electron. For the choice of J/Absolute value of t = 2, the spin gap is DELTA(var) = 0.181J and is smaller than the value of the corresponding spin system, DELTA0var = 0.25J. The existence of the bound state suggests that the excited state as a function of the electron density is discontinuous at half-filling if J/Absolute value of t is finite.

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页码：9831 / 9834

页数：4

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