ESR studies on the spin-liquid candidate $\kappa$-(BEDT-TTF)$_2$Cu$_2$(CN)$_{3}$: anomalous response below $T=8$ K

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

doi:10.1016/j.physb.2014.11.073

ESR studies on the spin-liquid candidate $\kappa$-(BEDT-TTF)$_2$Cu$_2$(CN)$_{3}$: anomalous response below $T=8$ K

Strongly Correlated Electrons 2015-06-22 v1

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

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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.

Keywords

quantum spin liquid ESR spectroscopy $\kappa$-(BEDT-TTF)$_2$Cu$_2$(CN)$_3$ anisotropic relaxation charge inhomogeneity dielectric response

Cite

@article{arxiv.1409.2033,
  title  = {ESR studies on the spin-liquid candidate $\kappa$-(BEDT-TTF)$_2$Cu$_2$(CN)$_{3}$: anomalous response below $T=8$ K},
  author = {K. G. Padmalekha and M. Blankenhorn and T. Ivek and L. Bogani and J. A. Schlueter and M. Dressel},
  journal= {arXiv preprint arXiv:1409.2033},
  year   = {2015}
}

Comments

4 pages, 4 figures, accepted in Physica B

ESR studies on the spin-liquid candidate $\kappa$-(BEDT-TTF)$_2$Cu$_2$(CN)$_{3}$: anomalous response below $T=8$ K

Abstract

Keywords

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