Giant nonlinear conduction from inhomogeneous charge order in rapidly cooled θ(BEDT-TTF)2RbZn(SCN)4

Taichi S. Inada, Ichiro Terasaki, Hatsumi Mori, and Takehiko Mori
Phys. Rev. B 79, 165102 – Published 2 April 2009

Abstract

We find a giant nonlinear conduction in the charge-ordered organic salt θ(BEDT-TTF)2RbZn(SCN)4 in a rapidly cooled state from 34 to 99 K, which cannot be ascribed to a simple Joule heating. The observed voltage-current characteristics are essentially identical to those of the related organic salt θ(BEDT-TTF)2CsZn(SCN)4, while the energy scale and the working temperatures are 1 order of magnitude higher. Considering that two kinds of charge-ordered domains coexist in this rapidly cooled state, we suggest that the inhomogeneity made of the two charge orders plays an essential role in the giant nonlinear conduction of the θ-type organic salts.

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  • Received 1 July 2008

DOI:https://doi.org/10.1103/PhysRevB.79.165102

©2009 American Physical Society

Authors & Affiliations

Taichi S. Inada and Ichiro Terasaki*

  • Department of Applied Physics, Waseda University, Tokyo 169-8555, Japan

Hatsumi Mori

  • The Institute for Solid State Physics, The University of Tokyo, Kashiwa, 277-8581, Japan

Takehiko Mori

  • Department of Organic and Polymeric Materials, Tokyo Institute of Technology, Tokyo 152-8552, Japan

  • *terra@waseda.jp

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Issue

Vol. 79, Iss. 16 — 15 April 2009

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