Impurity effect on superconducting properties in molecular substituted organic superconductor κ-(ET) 2Cu(NCS) 2

Naoki Yoneyama, Takahiko Sasaki, Hajime Oizumi, Norio Kobayashi

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6 Citations (Scopus)

Abstract

We report an impurity effect in the organic superconductor κ-(ET) 2Cu(NCS) 2 by substitution of the ET molecule with an analogue, bis(methylenedithio)tetrathiafulvalene (MT). The superconducting transition temperature decreases with increasing substitution. The in-plane magnetic penetration depth is enhanced with substitution, which is quantitatively attributed to the decrease in the in-plane mean free path. The enhancement of the penetration depth can also explain the reduction of the effective pinning in terms of the condensation energy.

Original languageEnglish
Article number123705
Journaljournal of the physical society of japan
Volume76
Issue number12
DOIs
Publication statusPublished - 2007 Dec 1

Keywords

  • Impurity
  • Magnetization
  • Mean free path
  • Molecular substitution
  • Organic superconductor
  • Penetration depth

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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