Field-induced incommensurate order in a quasi-1D S=1 antiferromagnet

被引：0

作者：

Sakai, Toru ^{[1
]}

Okamoto, Kiyomi ^{[2
]}

Okunishi, Kouichi ^{[3
]}

Tonegawa, Takashi ^{[4
]}

机构：

[1] Japan Atom Energy Agcy, Spring 8, Sayo, Hyogo 6795148, Japan

[2] Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan

[3] Niigata Univ, Dept Phys, Niigata 9502181, Japan

[4] Fukui Univ Technol, Dept Mech Engn, Fukui 910, Japan

来源：

LOW TEMPERATURE PHYSICS, PTS A AND B | 2006年 / 850卷

关键词：

quantum spin system; field-induced phase transition; incommensurate order; Haldane magnet;

D O I：

暂无

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

We investigate the S=1 frustrated antiferromagnetic quantum spin chain in magnetic field, using numerical exact diagonalization of finite-size clusters. The calculated critical exponents of the spin correlation functions indicate that the incommensurate spin correlation parallel to the external field can be stronger than the transverse antiferromagnetic one for some intermediate fields. When such an incommensurate correlation is dominant, the quasi-1D system with finite interchain interactions should exhibit long-range incommensurate order. We also discuss a possible mechanism for the recently observed field-induced phase of NDMAP within this framework.

引用

页码：1065 / +

页数：2