HOLE MOTION IN ONE-DIMENSIONAL T-J-J' MODEL

被引：0
|
作者：
DOI, I
SANO, K
TAKANO, K
机构：
[1] MIE UNIV,FAC MINATO KU,DEPT PHYS,TSU,MIE 514,JAPAN
[2] NAGOYA UNIV,DEPT PHYS,CHIKUSA KU,NAGOYA 46401,JAPAN
来源：
PHYSICA B | 1990年 / 165卷
关键词：
D O I：
10.1016/S0921-4526(09)80098-7
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We examined the one-dimensional t-J-J’ model by numerical diagonalization. This model describes electrons with infinite on-site repulsion, nearest-neighbor transfer t, exchange interaction J and, further, next-nearest-neighbor exchange interaction J’. In the case of one hole and J’/J≳0.5, the numerical ground state consists mainly of singlet dimers like that in the no-hole case (Heisenberg spin system). The energy spectrum and hole densities for low excited states show that the hole moves as a free quasiparticle, separated from the degrees of freedom for spins. © 1990, Elsevier Science Publishers B.V. (North-Holland). All rights reserved.
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收藏
页码：1025 / 1026
页数：2
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