QUANTUM PHASE TRANSITION OF A TRIANGULAR LATTICE SPIN TUBE AND EDGE SPIN EFFECTS

被引：2
|
作者：
Okunishi, Kouichi [1 ]
Yoshikawa, Shin-Ichiro [2 ]
Sakai, Toru
Miyashita, Seiji [2 ,3 ]
机构：
[1] Niigata Univ, Dept Phys, Niigata 9502181, Japan
[2] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan
[3] JST, CREST, Kawaguchi, Saitama 3320012, Japan
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS C | 2009年 / 20卷 / 09期
基金：
日本学术振兴会;
关键词：
Spin tube; spin gap; edge effect; DMRG;
D O I：
10.1142/S0129183109014485
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
We study the low-energy excitation of the quantum spin tube with the triangular lattice structure, using density matrix renormalization group. Taking account of the edge spin effect, we particularly investigate the spin gap behavior and the low-field magnetization curve near the quantum phase transition point in contrast with the usual free boundary condition. We then find that the bulk behavior of the spin tube can be extracted easier for the single spin termination.
引用
收藏
页码：1423 / 1430
页数：8
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