Metallic state and charge-order metal-insulator transition in the quasi-two-dimensional conductor κ-(BEDT-TTF)2Hg(SCN)2Cl
Metallic state and charge-order metal-insulator transition in the quasi-two-dimensional conductor κ-(BEDT-TTF)2Hg(SCN)2Cl
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DOI：
10.1103/physrevb.89.075133
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发表时间：
2014-02-26
影响因子：
3.7
通讯作者：
Lyubovskaya, R. N.
中科院分区：
文献类型：
--
作者：
Drichko, Natalia;Beyer, Rebecca;Lyubovskaya, R. N.
我们研究了高度受挫有机导体kappa-(BEDT-TTF)(2)Hg(SCN)(2)Cl在300-10 K温度范围内的光学和直流特性。在30 K以上的温度下，材料表现出半填充金属的性质，具有很强的电子-电子相关性。在30k时，化合物发生金属-绝缘体跃迁，我们称之为电荷有序跃迁。我们发现kappa-(BEDT-TTF)(2)Hg(SCN)(2)Cl的性质可以用一个配对电子晶体模型很好地解释。
We present a study of optical and dc properties of a highly frustrated organic conductor kappa-(BEDT-TTF)(2)Hg(SCN)(2)Cl in the 300-10 K temperature range. At temperatures above 30 K, the material shows properties of a half-filled metal with strong electron-electron correlations. At 30 K, the compound undergoes a metal-insulator transition which we identify as a charge-ordering transition. We find that properties of kappa-(BEDT-TTF)(2)Hg(SCN)(2)Cl are well explained by a model of a paired electron crystal.