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Electron Tunneling into Single Crystals of YBa2Cu3O7-δ

Published online by Cambridge University Press:  28 February 2011

J. M. Valles Jr. ,
M. Gurvitch ,
M. Cucolo ,
R. C. Dynes ,
J. P. Garno ,
L. F. Schneemeyer  and
J. V. Wasczcak
J. M. Valles Jr.
Affiliation:
AT&T Bell Laboratories Murray Hill, New Jersey 07974
M. Gurvitch
Affiliation:
AT&T Bell Laboratories Murray Hill, New Jersey 07974
M. Cucolo
Affiliation:
Dipartimento di Fisica, Universita' di Salerno, 84100 Salerno, Italy.
R. C. Dynes
Affiliation:
AT&T Bell Laboratories Murray Hill, New Jersey 07974
J. P. Garno
Affiliation:
AT&T Bell Laboratories Murray Hill, New Jersey 07974
L. F. Schneemeyer
Affiliation:
AT&T Bell Laboratories Murray Hill, New Jersey 07974
J. V. Wasczcak
Affiliation:
AT&T Bell Laboratories Murray Hill, New Jersey 07974
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Abstract

We have fabricated tunnel junctions between chemically etched single crystals of YBa2Cu3O7-δ and evaporated metal counterelectrodes which exhibit reproducible characteristics. Above the bulk critical temperature of YBa2Cu3O7-δ, Tc, the conductance, G(V), has a linear dependence with voltage and has some asymmetry. Below Tc, additional structure associated with the superconductivity appears in G(V). At T>>Tc there is a reproducible finite zero bias conductance.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 983
Copyright
Copyright © Materials Research Society 1990

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References

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