Muon-spin-relaxation measurements of magnetic penetration depth in organic superconductors (BEDT-TTF $)_{2}$ -X: X=Cu(NCS $)_{2}$ and Cu[N(CN $)_{2}$ ]Br

23 March 1992

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 68 (12), 1923-1926
https://doi.org/10.1103/physrevlett.68.1923

Abstract

The magnetic-field penetration depth λ in the organic superconductors κ-(BEDT-TTF

)_{2}

Cu(NCS

)_{2}

and κ-(BEDT-TTF

)_{2}

Cu[N(CN

)_{2}

]Br has been measured over a wide temperature region 20 mK≤T≤15 K via the muon-spin-relaxation technique. Linear variation of λ with T at low temperatures, found in both systems, is consistent with anisotropic superconducting pairings with line nodes in the energy gap. In the latter compound, we observe flux depinning at T∼5 K, well below

T_{c}

=12 K.

Keywords

This publication has 19 references indexed in Scilit:

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Cited by 125 articles

Muon-spin-relaxation measurements of magnetic penetration depth in organic superconductors (BEDT-TTF)2-X: X=Cu(NCS)2 and Cu[N(CN)2]Br

Abstract

Keywords

Muon-spin-relaxation measurements of magnetic penetration depth in organic superconductors (BEDT-TTF $)_{2}$ -X: X=Cu(NCS $)_{2}$ and Cu[N(CN $)_{2}$ ]Br