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Spin Dynamics of the Spin-1/2Kagome Lattice AntiferromagnetZnCu3(OH)6Cl2

J. S. Helton, K. Matan, M. P. Shores, E. A. Nytko, B. M. Bartlett, Y. Yoshida, Y. Takano, A. Suslov, Y. Qiu, J.-H. Chung, D. G. Nocera, Y. S. Lee
2007 Physical Review Letters  

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2006 pre-print
arXiv:cond-mat/0610539v1 fatcat:js6nzzy2tfeybcempc27qkfgde
2007 pre-print
arXiv:cond-mat/0610539v3 fatcat:5qqqvsbvubekzl3mt7atyh34n4
2007 accepted
arXiv:cond-mat/0610539v4 fatcat:tqqrbbh6srf7povkbzzcx7rmve
2006 pre-print
arXiv:cond-mat/0610539v2 fatcat:cbkdq5htmrh5vcq2afbendrgre
We have performed thermodynamic and neutron scattering measurements on the S=1/2 kagome lattice antiferromagnet Zn Cu_3 (OH)_6 Cl_2. The susceptibility indicates a Curie-Weiss temperature of ~ -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 with exponent less than or equal to 1. These results suggest that an unusual
more » ... in-liquid state with essentially gapless excitations is realized in this kagome lattice system.
doi:10.1103/physrevlett.98.107204 pmid:17358563 fatcat:selgz7eoqza6tbn7v3cxja7zse
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Citation

J. S. Helton, K. Matan, M. P. Shores, E. A. Nytko, B. M. Bartlett, Y. Yoshida, Y. Takano, A. Suslov, Y. Qiu, J.-H. Chung, D. G. Nocera, Y. S. Lee. "Spin Dynamics of the Spin-1/2Kagome Lattice AntiferromagnetZnCu3(OH)6Cl2." Physical Review Letters 98.10 (2007)