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Phys Rev Lett. 2009 May 1;102(17):176401. Epub 2009 Apr 29.

Dynamics and transport of the Z2 spin liquid: application to kappa-(ET)2Cu2(CN)3.

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Department of Physics, Harvard University, Cambridge Massachusetts 02138, USA.

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  • Phys Rev Lett. 2009 May 8;102(18):189903.


We describe neutron scattering, NMR relaxation, and thermal transport properties of Z2 spin liquids in two dimensions. Comparison to recent experiments on the spin S=1/2 triangular lattice antiferromagnet in kappa-(ET)2Cu2(CN)3 shows that this compound may realize a Z2 spin liquid. We argue that the topological "vison" excitations dominate thermal transport, and that recent thermal conductivity experiments by M. Yamashita et al. have observed the vison gap.

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