Phys. Rev. Lett. 96, 177002 (2006) [4 pages]Effect of Irradiation-Induced Disorder on the Conductivity and Critical Temperature of the Organic Superconductor κ-(BEDT-TTF)2Cu(SCN)2Received 1 December 2005; published 3 May 2006 We have introduced defects into clean samples of the organic superconductor κ-(BEDT- TTF)2Cu(SCN)2 in order to determine their effect on the temperature dependence of the interlayer conductivity σ and the critical temperature Tc. We find a violation of Matthiessen’s rule that can be explained by a model of σ involving a defect-assisted interlayer channel which acts in parallel with the bandlike conductivity. We observe an unusual dependence of Tc on residual resistivity, inconsistent with the generalized Abrikosov-Gor’kov theory for an order parameter with a single component, providing an important constraint on models of the superconductivity in this material. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.177002
DOI:
10.1103/PhysRevLett.96.177002
PACS:
74.70.Kn, 74.25.Fy, 74.62.Dh
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