Interplay of thermal and quantum spin fluctuations in the kagome lattice compound herbertsmithite

被引：93

作者：

Wulferding, Dirk ^{[1
]}

Lemmens, Peter ^{[1
]}

Scheib, Patric ^{[1
]}

Roeder, Jens ^{[2
]}

Mendels, Philippe ^{[3
]}

Chu, Shaoyan ^{[4
]}

Han, Tianheng ^{[5
]}

Lee, Young S. ^{[5
]}

机构：

[1] Tech Univ Carolo Wilhelmina Braunschweig, Inst Condensed Matter Phys, D-38106 Braunschweig, Germany

[2] Tech Univ Carolo Wilhelmina Braunschweig, Inst Phys & Theoret Chem, D-38106 Braunschweig, Germany

[3] Univ Paris 11, CNRS, Phys Solides Lab, UMR 8502, F-91405 Orsay, France

[4] MIT, Ctr Mat Sci & Engn, Cambridge, MA 02139 USA

[5] MIT, Dept Condensed Matter Phys, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 14期

关键词：

ANTIFERROMAGNET; ORDER;

D O I：

10.1103/PhysRevB.82.144412

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a Raman spectroscopic investigation of the herbertsmithite ZnCu3(OH)(6)Cl-2, a realization of a Heisenberg s=1/2 antiferromagnet on a perfect kagome lattice. Focusing on its magnetic excitation spectrum we find two components, a high-temperature quasielastic signal and a low temperature, broad maximum. The latter has a linear low-energy slope and extends to high energy. We have investigated the temperature dependence and symmetry properties of both signals. Our data agree with previous calculations and point to a gapless spin liquid ground state.

引用

页数：6

共 34 条

[31] Dzyaloshinskii-Moriya interactions in valence-bond systems [J].