Electron tunneling into single crystals of YBa2Cu3O7-

J. M. Valles, R. C. Dynes, A. M. Cucolo, M. Gurvitch, L. F. Schneemeyer, J. P. Garno, J. V. Waszczak

Research output: Contribution to journalArticle

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Abstract

We have fabricated tunnel junctions between chemically etched single crystals of YBa2Cu3O7- and evaporated metal counterelectrodes that exhibit reproducible characteristics. Above the bulk critical temperature of YBa2Cu3O7-, Tc, the conductance as a function of voltage, G(V), has a linear dependence on voltage and some asymmetry. Below Tc, additional structure associated with the superconducting state appears in G(V). At TTc there is a reproducible finite zero-bias conductance, which suggests that there are states at the Fermi energy in superconducting YBa2Cu3O7-. Junctions with Pb, Sn, Bi, Sb, PbBi, and Au counterelectrodes all show qualitatively similar behavior.

Original languageEnglish
Pages (from-to)11986-11996
Number of pages11
JournalPhysical Review B
Volume44
Issue number21
DOIs
StatePublished - 1 Jan 1991

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Electron tunneling
electron tunneling
Single crystals
Tunnel junctions
single crystals
Electric potential
electric potential
Fermi level
tunnel junctions
critical temperature
asymmetry
Metals
metals
Temperature
barium copper yttrium oxide
energy

Cite this

Valles, J. M., Dynes, R. C., Cucolo, A. M., Gurvitch, M., Schneemeyer, L. F., Garno, J. P., & Waszczak, J. V. (1991). Electron tunneling into single crystals of YBa2Cu3O7-. Physical Review B, 44(21), 11986-11996. https://doi.org/10.1103/PhysRevB.44.11986
Valles, J. M. ; Dynes, R. C. ; Cucolo, A. M. ; Gurvitch, M. ; Schneemeyer, L. F. ; Garno, J. P. ; Waszczak, J. V. / Electron tunneling into single crystals of YBa2Cu3O7-. In: Physical Review B. 1991 ; Vol. 44, No. 21. pp. 11986-11996.
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Valles, JM, Dynes, RC, Cucolo, AM, Gurvitch, M, Schneemeyer, LF, Garno, JP & Waszczak, JV 1991, 'Electron tunneling into single crystals of YBa2Cu3O7-', Physical Review B, vol. 44, no. 21, pp. 11986-11996. https://doi.org/10.1103/PhysRevB.44.11986

Electron tunneling into single crystals of YBa2Cu3O7-. / Valles, J. M.; Dynes, R. C.; Cucolo, A. M.; Gurvitch, M.; Schneemeyer, L. F.; Garno, J. P.; Waszczak, J. V.

In: Physical Review B, Vol. 44, No. 21, 01.01.1991, p. 11986-11996.

Research output: Contribution to journalArticle

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AU - Valles, J. M.

AU - Dynes, R. C.

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AU - Waszczak, J. V.

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Valles JM, Dynes RC, Cucolo AM, Gurvitch M, Schneemeyer LF, Garno JP et al. Electron tunneling into single crystals of YBa2Cu3O7-. Physical Review B. 1991 Jan 1;44(21):11986-11996. https://doi.org/10.1103/PhysRevB.44.11986