Temperature dependence of energy gaps in spin-1/2 dimerized Heisenberg chain

被引：2

作者：

Jiang, XF ^{[1
]}

Xing, DY

Chen, H

机构：

[1] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

[2] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China

[3] Tongji Univ, Pohl Inst Solid State Phys, Shanghai 200092, Peoples R China

[4] Tongji Univ, Dept Phys, Shanghai 200092, Peoples R China

[5] Changshu Coll, Dept Phys, Changsha 215500, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2002年 / 19卷 / 04期

关键词：

D O I：

10.1088/0256-307X/19/4/334

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a method which combines a thermal coherent state approach with a self-consistent quantum theory to investigate the spin-1/2 dimerized antiferromagnetic Heisenberg chain. It is found that both excitation gaps between the ground state and two lowest excited modes, the triplet one-magnon excitation and the singlet two-magnon bound state decrease monotonically with increasing temperature. Our results are consistent with those obtained from the other approximations.

引用

页码：560 / 562

页数：3

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