TY - JOUR
T1 - Disorder effect on superconductivity in organic superconductor κ-(BEDT-TTF)2Cu(NCS)2
AU - Sasaki, T.
AU - Oizumi, H.
AU - Yoneyama, N.
AU - Kobayashi, N.
PY - 2009
Y1 - 2009
N2 - The relation between the superconductivity and the scattering time τ of the quasiparticle in the organic superconductor κ-(BEDT-TTF)2Cu(NCS) 2 has been investigated by measuring the de Haas-van Alphen (dHvA) oscillations. The single crystals substituted partly with BMDT-TTF molecules, κ-[(BEDT-TTF)1-x(BMDT-TTF)x]2Cu(NCS) 2 are synthesized for introducing the nonmagnetic impurities. The oscillation frequency F 600 5 T and the effective mass ratio m* /mo 3.2 0.2 are the same with those of no substituted crystal. On the other hand, the BMDT-TTF molecule substitution reduces the quasiparticle scattering time τ ∼ 2.5 psec for x 0 to ∼ 0.5 psec for x 0.15. The relation between T c and τ in the nonmagnetic molecule substituted crystals is discussed in comparison with the Abrikosov-Gorkov relation.
AB - The relation between the superconductivity and the scattering time τ of the quasiparticle in the organic superconductor κ-(BEDT-TTF)2Cu(NCS) 2 has been investigated by measuring the de Haas-van Alphen (dHvA) oscillations. The single crystals substituted partly with BMDT-TTF molecules, κ-[(BEDT-TTF)1-x(BMDT-TTF)x]2Cu(NCS) 2 are synthesized for introducing the nonmagnetic impurities. The oscillation frequency F 600 5 T and the effective mass ratio m* /mo 3.2 0.2 are the same with those of no substituted crystal. On the other hand, the BMDT-TTF molecule substitution reduces the quasiparticle scattering time τ ∼ 2.5 psec for x 0 to ∼ 0.5 psec for x 0.15. The relation between T c and τ in the nonmagnetic molecule substituted crystals is discussed in comparison with the Abrikosov-Gorkov relation.
UR - http://www.scopus.com/inward/record.url?scp=77952481830&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77952481830&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/150/5/052224
DO - 10.1088/1742-6596/150/5/052224
M3 - Article
AN - SCOPUS:77952481830
SN - 1742-6588
VL - 150
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 5
M1 - 052224
ER -