Penetration depth study of superconducting gap structure of 2H-NbSe2

J. D. Fletcher, A. Carrington, P. Diener, P. Rodière, J. P. Brison, R. Prozorov, T. Olheiser, R. W. Giannetta

Research output: Contribution to journalArticlepeer-review

Abstract

We report measurements of the temperature dependence of both in-plane and out-of-plane penetration depths (λa and λc, respectively) in 2H-NbSe2. Measurements were made with a radio-frequency tunnel diode oscillator circuit at temperatures down to 100 mK. Analysis of the anisotropic superfluid density shows that a reduced energy gap is located on one or more of the quasi-two-dimensional Nb Fermi surface sheets rather than on the Se sheet, in contrast with some previous reports. This result suggests that the gap structure is not simply related to the weak electron-phonon coupling on the Se sheet and is therefore important for microscopic models of anisotropic superconductivity in this compound.

Original languageEnglish (US)
Article number057003
JournalPhysical review letters
Volume98
Issue number5
DOIs
StatePublished - Jan 2 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint

Dive into the research topics of 'Penetration depth study of superconducting gap structure of 2H-NbSe2'. Together they form a unique fingerprint.

Cite this