Hump like resistance anomaly in organic conductor β″-(BEDT-TTF) 2CsCd(SCN)4

Ryusuke Kondo, Jun Otsuji, Seiichi Kagoshima, Yoshio Nogami

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We investigate the low-temperature electronic phase of a two-dimensional organic conductor, β″-(BEDT-TTF)2CsCd(SCN)4 [where BEDT-TTF denotes bis(ethylenedithio)tetrathiafulvalene], which has a large hump between 32 and around 5K in the temperature dependence of the interlayer resistance. We present experimental results for the temperature dependence of the resistance under magnetic fields and its Kohler plots, and an x-ray diffraction study. We find that I) Kohler's rule is strongly violated below 32 K, although the rule is valid above 32 K, and II) weak superlattice spots appear at 15.6K in the x-ray study. On the basis of the experimental results, we suggest that the origin of the resistance hump is the formation of a possible charge density wave transition at about 32K by the nesting of a pair of large one-dimensional Fermi surfaces obtained in the electronic structure calculation based on the crystal structure at room temperature.

Original languageEnglish
Article number063702
Journaljournal of the physical society of japan
Volume77
Issue number6
DOIs
Publication statusPublished - Jun 1 2008

Keywords

  • BEDT-TTF salt
  • Electrical property
  • Kohler plot
  • Superlattice
  • β″-type

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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