Theory of superconductor-insulator transition in organic superconductor λ -(BETS)2FexGa1-xCl4

M. Terao, Yoji Ohashi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We investigate superconductivity and magnetism in the organic conductor λ-(BETS)2FexGa1-xCl4. In this material, it is known that the d-electrons on Fe-ions are ordered antiferromagnetically (TN<8.5-9 K) for 0.4<x ≤ 1, while superconductivity (TSC<6 K) of π-electrons appears when 0 ≤ x<0.4. In this paper, including the detailed band structure of this material, we discuss the exchange interaction between the d- and π-electrons, focusing on its role in the antiferromagnetism and superconductivity. We show that the inclusion of only this π-d exchange interaction is difficult to explain both the observed x-dependence of TN and TSC. To understand the phase diagram of λ-(BETS)2FexGa 1-xCl4, we point out that the Coulomb interaction between π-electrons is also important.

Original languageEnglish
Pages (from-to)324-328
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume412-414
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2004 Oct
Externally publishedYes

Fingerprint

organic superconductors
Superconducting materials
Superconductivity
insulators
superconductivity
Electrons
Exchange interactions
electrons
Organic conductors
Antiferromagnetism
antiferromagnetism
Magnetism
interactions
Coulomb interactions
Band structure
Phase diagrams
conductors
phase diagrams
inclusions
Ions

Keywords

  • Magnetism
  • Organic superconductor
  • Superconductor-insulator transition

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Theory of superconductor-insulator transition in organic superconductor λ -(BETS)2FexGa1-xCl4. / Terao, M.; Ohashi, Yoji.

In: Physica C: Superconductivity and its Applications, Vol. 412-414, No. SPEC. ISS., 10.2004, p. 324-328.

Research output: Contribution to journalArticle

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