PHASE-DIAGRAM OF S=1/2 ANTIFERROMAGNETIC XXZ CHAIN WITH NEXT-NEAREST-NEIGHBOR INTERACTIONS

被引：77

作者：

NOMURA, K

OKAMOTO, K

机构：

[1] Department of Physics, Tokyo Institute of Technology, Oh-okayama, Meguro-ku

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1993年 / 62卷 / 04期

关键词：

D O I：

10.1143/JPSJ.62.1123

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We numerically investigate the critical lines of the fluid-dimer and the Neel-dimer transitions of the S=1/2 antiferromagnetic XXZ chain with next-nearest interactions, assuming the asymptotic behavior to be determined by the quantum sine-Gordon model. Our result is different from that of Tonegawa, Harada and Kaburagi, who used the phenomenological renormalization group (PRG). We show that the PRG may lead to a false critical point when it is applied to the Kosterlitz-Thouless-type transition.

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页码：1123 / 1126

页数：4

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