Magnetic penetration depth of -(BEDT-TTF)2Cu(NCS)2 strong evidence for conventional cooper pairing

M. Lang, N. Toyota, T. Sasaki, H. Sato

Research output: Contribution to journalArticlepeer-review

92 Citations (Scopus)


We report on dc magnetization measurements of high-quality single crystals of the title organic super-conductor. The temperature dependence of the magnetic penetration depth is estimated from the slope of the linear M(lnH) dependence in the London regime. An excellent agreement with the BCS theory for a weak-coupling superconductor in the clean limit is found. An attempt is made to relate the mixed-state-derived penetration depth, (T0)=53520 mm, to normal-state Fermi-surface parameters. The strongly correlated heavy carriers appear to be of crucial importance to explain superconductivity in this material.

Original languageEnglish
Pages (from-to)1443-1446
Number of pages4
JournalPhysical Review Letters
Issue number9
Publication statusPublished - 1992


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