Lattice instability in the spin ladder system under magnetic field

被引：14

作者：

Nagaosa, N ^{[1
]}

Murakami, S ^{[1
]}

机构：

[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1998年 / 67卷 / 06期

关键词：

spin ladder; Haldane system; spin-gap; magnetic field; lattice distortion;

D O I：

10.1143/JPSJ.67.1876

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We theoretically study the lattice instability in the spin-gap systems under it magnetic field. When the magnetic field is larger than a critical value h(c1), the spin gap collapses and the magnetization phenomenon occurs. We found that lattice distortion occurs in the spin ladder at an incommensurate wave vector corresponding to the magnetization, while it does not occur in the Haldane system. At low temperatures the magnetization curve shows a first order phase transition with this lattice distortion.

引用

页码：1876 / 1878

页数：3

共 23 条

[1] Identification of nuclear relaxation processes in a gapped quantum magnet: H-1 NMR in the S=1/2 Heisenberg ladder Cu-2(C5H12N2)(2)Cl-4 [J].