Substitution Effect by Deuterated Donors on Superconductivity in .KAPPA.-(BEDT-TTF)2Cu[N(CN)2]Br

DOI Web Site Web Site BIBCODE 12 Citations 45 References
  • Yoneyama Naoki
    Institute for Materials Research, Tohoku University
  • Sasaki Takahiko
    Institute for Materials Research, Tohoku University
  • Kobayashi Norio
    Institute for Materials Research, Tohoku University Center for Low Temperature Science, Tohoku University

Bibliographic Information

Other Title
  • Substitution Effect by Deuterated Donors on Superconductivity in κ-(BEDT-TTF)2Cu[N(CN)2]Br
  • Substitution Effect by Deuterated Donors on Superconductivity in カッパ BEDT TTF 2Cu N CN 2 Br
  • Substitution Effect by Deuterated Donors on Superconductivity in κ-(BEDT-TTF)<sub>2</sub>Cu[N(CN)<sub>2</sub>]Br

Search this article

Abstract

We investigate the superconductivity in the deuterated BEDT-TTF molecular substitution system κ-[(h8-BEDT-TTF)1−x(d8-BEDT-TTF)x]2Cu[N(CN)2]Br, where h8 and d8 denote fully hydrogenated and deuterated molecules, respectively. Systematic and wide-range (x=0–1) substitution can accurately control chemical pressure near the Mott boundary, which results in the modification of the superconductivity. After cooling slowly, an increase in Tc observed up to x∼0.1 is evidently caused by the chemical pressure effect. Neither a reduction of Tc nor a suppression of superconducting volume fraction is found below x∼0.5. This demonstrates that the effect of disorder by substitution is negligible in the present system. With further increase in x, both Tc and superconducting volume fraction start to decrease toward values at x=1.

Journal

Citations (12)*help

See more

References(45)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top