Electrical and structural properties of θ-type BEDT-TTF organic conductors under uniaxial strain

Ryusuke Kondo, Momoka Higa, Seiichi Kagoshima, Hirotada Hoshino, Takehiko Mori, Hatsumi Mori

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

In order to investigate the relationships between crystal structures and electronic properties of θ-type BEDT-TTF organic conductors, electrical properties of θ-(BEDT-TTF) 2Ag(CN) 2 and θ-(BEDT-TTF) 2CsZn(SCN) 4 and crystal structures of θ-(BEDT-TTF) 2CsZn(SCN) 4 under uniaxial strain are investigated. The resistivity measurements for both salts under uniaxial strain show that the intercolumnar uniaxial strain preserves the metallic nature while the intra-columnar one induces an insulating behavior, which are reminiscent of the charge-ordered state of θ-(BEDT-TTF) 2RbZn(SCN) 4. Structure analyses of θ-(BEDT-TTF) 2CsZn(SCN) 4 under uniaxial strain indicate that the inter-columnar strain slightly increases the diagonal transfer integral but does not vary the vertical one, and the intra-columnar uniaxial strain largely increases the vertical transfer integral but does not change the diagonal one. Based on these experimental results, the key parameters to determine the electrical properties of θ-type BEDT-TTF salts are discussed. It is suggested that the transfer integral along the intra-columnar direction dominates the occurence of the charge-ordered state.

Original languageEnglish
Article number044716
JournalJournal of the Physical Society of Japan
Volume75
Issue number4
DOIs
Publication statusPublished - Apr 2006
Externally publishedYes

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axial strain
conductors
electrical properties
salts
crystal structure
electrical resistivity
electronics

Keywords

  • θ-type
  • BEDT-TTF salt
  • Crystal structure analysis
  • Electrical property
  • Uniaxial strain

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Electrical and structural properties of θ-type BEDT-TTF organic conductors under uniaxial strain. / Kondo, Ryusuke; Higa, Momoka; Kagoshima, Seiichi; Hoshino, Hirotada; Mori, Takehiko; Mori, Hatsumi.

In: Journal of the Physical Society of Japan, Vol. 75, No. 4, 044716, 04.2006.

Research output: Contribution to journalArticle

Kondo, Ryusuke ; Higa, Momoka ; Kagoshima, Seiichi ; Hoshino, Hirotada ; Mori, Takehiko ; Mori, Hatsumi. / Electrical and structural properties of θ-type BEDT-TTF organic conductors under uniaxial strain. In: Journal of the Physical Society of Japan. 2006 ; Vol. 75, No. 4.
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