Evidence for s-wave superconductivity in noncentrosymmetric Re3W from magnetic penetration depth measurements

TitleEvidence for s-wave superconductivity in noncentrosymmetric Re3W from magnetic penetration depth measurements
Publication TypeJournal Article
Year of Publication2007
AuthorsZuev YL, Kuznetsova VA, Prozorov R, Vannette MD, Lobanov MV, Christen DK, Thompson JR
Journal TitlePhysical Review B
Volume76
Pages132508
Date PublishedOct
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberISI:000250619800024
KeywordsINVERSION SYMMETRY, system
Abstract

We report measurements of the temperature dependence of the magnetic penetration depth lambda(T) in noncentrosymmetric superconductor Re3W. We employed two experimental techniques: extraction of lambda(T) from magnetic dc susceptibility, measured on a powder sample, and the rf tunnel diode resonator technique, where a bulk polycrystalline sample was used. The results of both techniques agree: the temperature dependence of the penetration depth can be well described by weak-coupling, dirty-limit, s-wave BCS theory where we obtain Delta(0)/k(B)T(C)=1.76 +/- 0.05. No evidence for unconventional pairing resulting from the absence of the inversion symmetry is found.

DOI10.1103/PhysRevB.76.132508
Alternate JournalPhys. Rev. B