Josephson effect in the unusual superconductors Lu2Fe3Si5, LiTi2O4, and UBe13

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

doi:10.1016/0378-4363(85)90436-X

Josephson effect in the unusual superconductors Lu₂Fe₃Si₅, LiTi₂O₄, and UBe₁₃

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

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

A Josephson supercurrent, which can be split by microwave photons of frequency ν into Shapiro steps of spacing ΔV = hν/2e, is expected between superconductors of like pairing type, either s- or p-wave. A weaker, and possibly unobservable effect, with step spacing Δ 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 LiTi₂O₄ and Lu₂Fe₃Si₅. In both cases we find unambiguous indication of s-wave pairing, as in Nb. The same experiment on the heavy-fermion superconductor UBe₁₃ in the range 0.7-7 K also reveals steps of spacing ΔV. This indicates that UBe₁₃ has been induced into a state of s-wave superconductivity by proximity with the s-wave superconductors Nb.

Original language	English
Pages (from-to)	65-68
Number of pages	4
Journal	Physica B+C
Volume	135
Issue number	1-3
DOIs	https://doi.org/10.1016/0378-4363(85)90436-X
State	Published - Dec 2 1985

Bibliographical note

Funding Information:
* Permanent address: Carleton College, Northfield, MN 55057, USA. ** Lawrence Laboratory, Livermore, CA 94550, USA. * Operated for the USDOE by Iowa State University under contract No. W-7405-Eng-82. This work was supported by the Director for Energy Research, Office of Basic Energy Science.

Funding

* Permanent address: Carleton College, Northfield, MN 55057, USA. ** Lawrence Laboratory, Livermore, CA 94550, USA. * Operated for the USDOE by Iowa State University under contract No. W-7405-Eng-82. This work was supported by the Director for Energy Research, Office of Basic Energy Science.

Funders
U.S. Department of Energy Office of Basic Science
Iowa State University

ASJC Scopus subject areas

General Engineering

Access to Document

10.1016/0378-4363(85)90436-X

Cite this

@article{35f0017c9aab415f8e1ea881bae7154c,

title = "Josephson effect in the unusual superconductors Lu2Fe3Si5, LiTi2O4, and UBe13",

abstract = "A Josephson supercurrent, which can be split by microwave photons of frequency ν into Shapiro steps of spacing ΔV = hν/2e, is expected between superconductors of like pairing type, either s- or p-wave. A weaker, and possibly unobservable effect, with step spacing Δ 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 LiTi2O4 and Lu2Fe3Si5. In both cases we find unambiguous indication of s-wave pairing, as in Nb. The same experiment on the heavy-fermion superconductor UBe13 in the range 0.7-7 K also reveals steps of spacing ΔV. This indicates that UBe13 has been induced into a state of s-wave superconductivity by proximity with the s-wave superconductors Nb.",

author = "Wolf, \{E. L.\} and Noer, \{R. J.\} and S. Han and Ng, \{K. W.\} and Chen, \{T. P.\} and Finnemore, \{D. K.\} and L. Tanner",

note = "Funding Information: * Permanent address: Carleton College, Northfield, MN 55057, USA. ** Lawrence Laboratory, Livermore, CA 94550, USA. * Operated for the USDOE by Iowa State University under contract No. W-7405-Eng-82. This work was supported by the Director for Energy Research, Office of Basic Energy Science.",

year = "1985",

month = dec,

day = "2",

doi = "10.1016/0378-4363(85)90436-X",

language = "English",

volume = "135",

pages = "65--68",

number = "1-3",

}

TY - JOUR

T1 - Josephson effect in the unusual superconductors Lu2Fe3Si5, LiTi2O4, and UBe13

AU - Wolf, E. L.

AU - Noer, R. J.

AU - Han, S.

AU - Ng, K. W.

AU - Chen, T. P.

AU - Finnemore, D. K.

AU - Tanner, L.

N1 - Funding Information: * Permanent address: Carleton College, Northfield, MN 55057, USA. ** Lawrence Laboratory, Livermore, CA 94550, USA. * Operated for the USDOE by Iowa State University under contract No. W-7405-Eng-82. This work was supported by the Director for Energy Research, Office of Basic Energy Science.

PY - 1985/12/2

Y1 - 1985/12/2

N2 - A Josephson supercurrent, which can be split by microwave photons of frequency ν into Shapiro steps of spacing ΔV = hν/2e, is expected between superconductors of like pairing type, either s- or p-wave. A weaker, and possibly unobservable effect, with step spacing Δ 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 LiTi2O4 and Lu2Fe3Si5. In both cases we find unambiguous indication of s-wave pairing, as in Nb. The same experiment on the heavy-fermion superconductor UBe13 in the range 0.7-7 K also reveals steps of spacing ΔV. This indicates that UBe13 has been induced into a state of s-wave superconductivity by proximity with the s-wave superconductors Nb.

AB - A Josephson supercurrent, which can be split by microwave photons of frequency ν into Shapiro steps of spacing ΔV = hν/2e, is expected between superconductors of like pairing type, either s- or p-wave. A weaker, and possibly unobservable effect, with step spacing Δ 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 LiTi2O4 and Lu2Fe3Si5. In both cases we find unambiguous indication of s-wave pairing, as in Nb. The same experiment on the heavy-fermion superconductor UBe13 in the range 0.7-7 K also reveals steps of spacing ΔV. This indicates that UBe13 has been induced into a state of s-wave superconductivity by proximity with the s-wave superconductors Nb.

UR - https://www.scopus.com/pages/publications/0022219412

UR - https://www.scopus.com/pages/publications/0022219412#tab=citedBy

U2 - 10.1016/0378-4363(85)90436-X

DO - 10.1016/0378-4363(85)90436-X

M3 - Article

AN - SCOPUS:0022219412

SN - 0378-4363

VL - 135

SP - 65

EP - 68

JO - Physica B+C

JF - Physica B+C

IS - 1-3

ER -