Spin dynamics of the spin-1/2 Kagome lattice antiferromagnet ZnCu3(OH)6Cl2

被引：745

作者：

Helton, J. S. ^{[1
]}

Matan, K.

Shores, M. P.

Nytko, E. A.

Bartlett, B. M.

Yoshida, Y.

Takano, Y.

Suslov, A.

Qiu, Y.

Chung, J. -H.

Nocera, D. G.

Lee, Y. S.

机构：

[1] MIT, Dept Phys, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[2] MIT, Dept Chem, Cambridge, MA 02139 USA

[3] Univ Florida, Dept Phys, Gainesville, FL 32611 USA

[4] Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

[5] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[6] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.98.107204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have performed thermodynamic and neutron scattering measurements on the S=1/2 kagome lattice antiferromagnet ZnCu3(OH)(6)Cl-2. The susceptibility indicates a Curie-Weiss temperature of theta(CW)similar or equal to-300 K; however, no magnetic order is observed down to 50 mK. Inelastic neutron scattering reveals a spectrum of low energy spin excitations with no observable gap down to 0.1 meV. The specific heat at low-T follows a power law temperature dependence. These results suggest that an unusual spin liquid state with essentially gapless excitations is realized in this kagome lattice system.

引用

页数：4

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