Theory of Neel and valence-bond solid phases on the kagome lattice of Zn paratacamite

被引：13

作者：

Lawler, Michael J. ^{[1
]}

Fritz, Lars ^{[2
]}

Kim, Yong Baek ^{[1
]}

Sachdev, Subir ^{[2
]}

机构：

[1] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada

[2] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 18期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.100.187201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Recently, neutron scattering data on powder samples of Zn paratacamite, ZnxCu4-x(OH)(6)Cl-2, with small Zn concentration has been interpreted as evidence for valence-bond solid and Neel ordering [S.-H. Lee , Nat. Mater. 6, 853 (2007)]. We study the classical and quantum Heisenberg models on the distorted kagome lattice appropriate for Zn paratacamite at low Zn doping. Our theory naturally leads to the emergence of the valence-bond solid and collinear magnetic order at zero temperature. Implications of our results to the existing experiments are discussed. We also suggest future inelastic neutron and x-ray scattering experiments that can test our predictions.

引用

页数：4

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