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arXiv · 2003.07211

Anomalous 2D-confined electronic transport in layered organic charge-glass systems

Takuro Sato·Kazuya Miyagawa·Masafumi Tamura·Kazushi Kanoda
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Abstract

To get insight into the nature of the electronic fluid in the frustration-driven charge glasses, we investigate in-plane and out-of-plane charge transport for several quasi-triangular-lattice organic systems, $\theta$-(BEDT-TTF)$_2$X [X=RbZn(SCN)$_4$, CsZn(SCN)$_4$ and I$_3$]. These compounds host a charge order, charge glass and Fermi liquid, depending on the strength of charge frustration. We find that the resistivity exhibits extremely two-dimensional (2D) anisotropy and contrasting temperature dependence between in the in-plane and out-of-plane directions in the charge glass phase, qualitatively distinguished from the charge order and metallic states. The experimental features indicate that the frustration-induced charge glass carries an anomalous 2D-confined electronic fluid with possible charge excitations other than conventional quasiparticles.

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Takuro Sato, Kazuya Miyagawa, Masafumi Tamura, Kazushi Kanoda. 2020-03-16. Anomalous 2D-confined electronic transport in layered organic charge-glass systems. https://doi.org/10.1103/physrevlett.125.146601

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