Spin Dynamics of the Spin-Kagome Lattice Antiferromagnet
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- 9 March 2007
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 98 (10), 107204
- https://doi.org/10.1103/physrevlett.98.107204
Abstract
We have performed thermodynamic and neutron scattering measurements on the kagomé lattice antiferromagnet . The susceptibility indicates a Curie-Weiss temperature of ; 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- follows a power law temperature dependence. These results suggest that an unusual spin liquid state with essentially gapless excitations is realized in this kagomé lattice system.
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