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

Abstract

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.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division; European Research Council (ERC); German Research Foundation (DFG)
OSTI Identifier:
1390956
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physica. B, Condensed Matter; Journal Volume: 460; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Padmalekha, K. G., Blankenhorn, M., Ivek, T., Bogani, L., Schlueter, J. A., and Dressel, M.. ESR studies on the spin-liquid candidate κ-(BEDT-TTF)2Cu2(CN)3: Anomalous response below T=8K. United States: N. p., 2015. Web. doi:10.1016/j.physb.2014.11.073.
Padmalekha, K. G., Blankenhorn, M., Ivek, T., Bogani, L., Schlueter, J. A., & Dressel, M.. ESR studies on the spin-liquid candidate κ-(BEDT-TTF)2Cu2(CN)3: Anomalous response below T=8K. United States. doi:10.1016/j.physb.2014.11.073.
Padmalekha, K. G., Blankenhorn, M., Ivek, T., Bogani, L., Schlueter, J. A., and Dressel, M.. Sun . "ESR studies on the spin-liquid candidate κ-(BEDT-TTF)2Cu2(CN)3: Anomalous response below T=8K". United States. doi:10.1016/j.physb.2014.11.073.
@article{osti_1390956,
title = {ESR studies on the spin-liquid candidate κ-(BEDT-TTF)2Cu2(CN)3: Anomalous response below T=8K},
author = {Padmalekha, K. G. and Blankenhorn, M. and Ivek, T. and Bogani, L. and Schlueter, J. A. and Dressel, M.},
abstractNote = {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.},
doi = {10.1016/j.physb.2014.11.073},
journal = {Physica. B, Condensed Matter},
number = C,
volume = 460,
place = {United States},
year = {Sun Mar 01 00:00:00 EST 2015},
month = {Sun Mar 01 00:00:00 EST 2015}
}