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arXiv 1409.2033cond-mat.str-el
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ESR对自旋液体候选物$κ$ -(BEDT-TTF)$_2$ Cu $_2$(CN)$_{3}$的研究:低于$T=8$ K的异常响应

ESR studies on the spin-liquid candidate $κ$-(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

摘要:

有机导体$κ$ -(BEDT-TTF)$_2$ Cu $_2$(CN)$_{3}$似乎形成量子自旋液体,尽管在低温下在电荷、自旋和晶格自由度中观察到不寻常的性质。本文报道了$κ$ -(BEDT-TTF)$_2$ Cu $_2$(CN)$_{3}$单晶X波段ESR随温度和角度变化的研究结果。我们发现两个各向异性弛豫机制在低温下的迹象,并将它们与在其他强相关系统中观察到的自旋液体行为进行比较。此外,我们可以认识到在阴离子层的铜离子的电荷不均匀性。这种紊乱可能与在该化合物中测量的介电响应有关。

英文摘要:

The organic conductor $κ$-(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 $κ$-(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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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