Nonlinear conductivity with an extremely small threshold electric field in the organic conductor (TSMTTP)(I3)53

Takehiko Mori, Tadashi Kawamoto, Ichiro Terasaki, Toru Kakiuchi, and Hiroshi Sawa
Phys. Rev. B 75, 235103 – Published 5 June 2007

Abstract

(TSMTTP)(I3)53 is a 16-filled one-dimensional system composed of an extended donor molecule which has two tetrathiafulvalene (TTF) units in a molecule, where TSM-TTP is 2,5-bis[4,5-bis(methylseleno)-1,3-dithiol-2-ylidene]-1,3,4,6-tetrathiapentalene. Nonlinear conductivity is observed in the insulating state below 20K, and the metallic state is restored above a very small threshold electric field of 0.3Vcm at 4.2K. The extremely sensitive nonlinearity is ascribed to the inhomogeneous insulating state generated by the weak and disordered anion potentials on the otherwise highly conducting intramolecular charge order state in the double-TTF molecule.

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  • Received 28 December 2006

DOI:https://doi.org/10.1103/PhysRevB.75.235103

©2007 American Physical Society

Authors & Affiliations

Takehiko Mori* and Tadashi Kawamoto

  • Department of Organic and Polymeric Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan

Ichiro Terasaki

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

Toru Kakiuchi and Hiroshi Sawa

  • Department of Materials Structure Science, The Graduate University for Advanced Studies, Tsukuba, Ibaraki, 305-0801, Japan

  • *Also at the Department of Chemistry and Materials Science, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan. Electronic address: takehiko@o.cc.titech.ac.jp
  • Also at the Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan.

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Issue

Vol. 75, Iss. 23 — 15 June 2007

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