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

Journal Article · Sun Mar 01 00:00:00 EST 2015 · Physica. B, Condensed Matter

DOI:https://doi.org/10.1016/j.physb.2014.11.073· OSTI ID:1390956

Padmalekha, K. G.; Blankenhorn, M.; Ivek, T.; Bogani, L.; Schlueter, J. A.; Dressel, M.

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.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division; European Research Council (ERC); German Research Foundation (DFG)
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1390956
• Journal Information: Physica. B, Condensed Matter, Vol. 460, Issue C; ISSN 0921-4526
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY