ESR studies on the spin-liquid candidate κ-(BEDT-TTF)2Cu2(CN)3: Anomalous response below T=8K

The organic conductor kappa-(BEDT-TTF)(2)Cu-2(CN)(3) seems to form a quantum spin liquid, although at low temperatures unusual properties are seen in the charge, spin and lattice degrees of freedom. Here we report results of X-band ESR studies of kappa-(BEDT-TTF)(2)Cu-2(CN)(3) single crystals as a f...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2015-03, Vol.460 (C)
Main Authors: Padmalekha, K. G., Blankenhorn, M., Ivek, T., Bogani, L., Schlueter, J. A., Dressel, M.
Format: Article
Language:English
Subjects:
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
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Summary:The organic conductor kappa-(BEDT-TTF)(2)Cu-2(CN)(3) seems to form a quantum spin liquid, although at low temperatures unusual properties are seen in the charge, spin and lattice degrees of freedom. Here we report results of X-band ESR studies of kappa-(BEDT-TTF)(2)Cu-2(CN)(3) single crystals as a function of temperature and angle. We find indications of two anisotropic relaxation mechanisms at low temperatures and compare them to the spin-liquid behavior observed in other strongly correlated systems. In addition, we can recognize charge inhomogeneities in the copper ions of the anion layer. This disorder might be linked to the dielectric response measured in this compound.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2014.11.073