JOSEPHSON EFFECT IN THE UNUSUAL SUPERCONDUCTORS Lu//2Fe//3Si//5, LiTi//2O//4, and UBe//1//3.

E. L. Wolf, R. J. Noer, S. Han, K. W. Ng, T. P. Chen, D. K. Finnemore, L. Tanner

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A Josephson supercurrent, which can be split by microwave photons of frequency v into Shapiro steps of spacing TRIAN OP V equals hv/2e, is expected between superconductors of like pairing type, either s- or p-wave. A weaker, and possibly unobservable effect, with step spacing TRIAN OP V/2 was predicted by Pals and van Haeringen between electrodes of unlike pairing type. Experiments using K-band microwaves and a Nb point contact have been carried out at 1. 2 K on the d-band superconductors LiTi//2O//4 and Lu//2Fe//3Si//5. In both cases we find unambiguous indication of s-wave pairing, as in Nb. The same experiment on the heavy-fermion superconductor UBe//1//3 in the range 0. 7-7 K also reveals steps of spacing TRIAN OP V. This indicates that UBe//1//3 has been induced into a state of s-wave superconductivity by proximity with the s-wave superconductor Nb.

Original languageEnglish (US)
Title of host publicationUnknown Host Publication Title
EditorsKarl A.Jr. Gschneidner, Edward L. Wolf
PublisherNorth-Holland
Pages65-68
Number of pages4
StatePublished - 1985

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Superconducting materials
Heavy fermion superconductors
Microwaves
Point contacts
Superconductivity
Photons
Experiments
Electrodes

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Wolf, E. L., Noer, R. J., Han, S., Ng, K. W., Chen, T. P., Finnemore, D. K., & Tanner, L. (1985). JOSEPHSON EFFECT IN THE UNUSUAL SUPERCONDUCTORS Lu//2Fe//3Si//5, LiTi//2O//4, and UBe//1//3. In K. A. J. Gschneidner, & E. L. Wolf (Eds.), Unknown Host Publication Title (pp. 65-68). North-Holland.

JOSEPHSON EFFECT IN THE UNUSUAL SUPERCONDUCTORS Lu//2Fe//3Si//5, LiTi//2O//4, and UBe//1//3. / Wolf, E. L.; Noer, R. J.; Han, S.; Ng, K. W.; Chen, T. P.; Finnemore, D. K.; Tanner, L.

Unknown Host Publication Title. ed. / Karl A.Jr. Gschneidner; Edward L. Wolf. North-Holland, 1985. p. 65-68.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wolf, EL, Noer, RJ, Han, S, Ng, KW, Chen, TP, Finnemore, DK & Tanner, L 1985, JOSEPHSON EFFECT IN THE UNUSUAL SUPERCONDUCTORS Lu//2Fe//3Si//5, LiTi//2O//4, and UBe//1//3. in KAJ Gschneidner & EL Wolf (eds), Unknown Host Publication Title. North-Holland, pp. 65-68.
Wolf EL, Noer RJ, Han S, Ng KW, Chen TP, Finnemore DK et al. JOSEPHSON EFFECT IN THE UNUSUAL SUPERCONDUCTORS Lu//2Fe//3Si//5, LiTi//2O//4, and UBe//1//3. In Gschneidner KAJ, Wolf EL, editors, Unknown Host Publication Title. North-Holland. 1985. p. 65-68
Wolf, E. L. ; Noer, R. J. ; Han, S. ; Ng, K. W. ; Chen, T. P. ; Finnemore, D. K. ; Tanner, L. / JOSEPHSON EFFECT IN THE UNUSUAL SUPERCONDUCTORS Lu//2Fe//3Si//5, LiTi//2O//4, and UBe//1//3. Unknown Host Publication Title. editor / Karl A.Jr. Gschneidner ; Edward L. Wolf. North-Holland, 1985. pp. 65-68
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AB - A Josephson supercurrent, which can be split by microwave photons of frequency v into Shapiro steps of spacing TRIAN OP V equals hv/2e, is expected between superconductors of like pairing type, either s- or p-wave. A weaker, and possibly unobservable effect, with step spacing TRIAN OP V/2 was predicted by Pals and van Haeringen between electrodes of unlike pairing type. Experiments using K-band microwaves and a Nb point contact have been carried out at 1. 2 K on the d-band superconductors LiTi//2O//4 and Lu//2Fe//3Si//5. In both cases we find unambiguous indication of s-wave pairing, as in Nb. The same experiment on the heavy-fermion superconductor UBe//1//3 in the range 0. 7-7 K also reveals steps of spacing TRIAN OP V. This indicates that UBe//1//3 has been induced into a state of s-wave superconductivity by proximity with the s-wave superconductor Nb.

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