Interplay between magnetism and conductivity in the one-dimensional organic conductor TPP [Fe (Pc) (CN) 2] 2

M. Kimata, Y. Takahide, A. Harada, H. Satsukawa, K. Hazama, T. Terashima, S. Uji, T. Naito, T. Inabe

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The strongly nonlinear current-voltage (I-V) characteristics and the large negative magnetoresistance (MR) are observed at low temperatures in the one-dimensional organic conductor TPP [Fe (Pc) (CN) 2] 2. The nonlinear I-V curves are interpreted as the transport of the electrons and holes excited from the charge ordered state on the Fe (Pc) (CN) 2 chains, whose energy gap strongly depends on electric fields. The negative MR is enhanced as temperature decreases, and the resistance steeply changes over four orders of magnitude around 15 T at 1.5 K. This decrease is associated with a magnetic torque anomaly, and the energy gap is rapidly reduced around 15 T. The detailed analyses of the I-V curves show that the electric flux distribution, i.e., the dimensionality of the Coulomb interaction between the carriers, also changes around 15 T.

Original languageEnglish
Article number085110
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number8
DOIs
Publication statusPublished - 2009 Aug 18
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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