Very-low-frequency excitations in frustrated two-dimensional S=1/2 Heisenberg antiferromagnets -: art. no. 047601

被引：50

作者：

Carretta, P

Melzi, R

Papinutto, N

Millet, P

机构：

[1] Dipartimento Fis A Volta, I-27100 Pavia, Italy

[2] Unita INFM Pavia, I-27100 Pavia, Italy

[3] CNRS, Ctr Elaborat Mat & Etud Struct, F-31055 Toulouse, France

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.88.047601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Muon spin resonance and Li-7 NMR relaxation measurements in frustrated two-dimensional S = 1/2 Heisenberg antiferromagnets on a square lattice are presented. It is found that, in both Li2VOSiO4 and Li2VOGeO4, spin dynamics at frequencies orders of magnitude below the Heisenberg exchange frequency are present. These dynamics are associated with the motions of walls separating coexisting collinear domains with a magnetic wave vector rotated by 90degrees.

引用

页码：4 / 476014

页数：4

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