Reproducible tunneling data on chemically etched single crystals of YBa2Cu3O7

Reproducible tunneling data on chemically etched single crystals of YBa2Cu3O7

Tunnel junctions have been fabricated between chemically etched single crystals of YBa2Cu3O7 and evaporated metal counterelectrodes and found to exhibit reproducible characteristics. Above the bulk Tc of YBa2Cu3O7, the conductance G(V) has a linear dependence with voltage and has some asymmetry. Bel...

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Veröffentlicht in:Physical review letters 1989-08, Vol.63 (9), p.1008-1011
Hauptverfasser: Gurvitch, M, Valles, Jr, JM, Cucolo, AM, Dynes, RC, Garno, JP, Schneemeyer, LF, Waszczak, JV
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container_end_page 1011
container_issue 9
container_start_page 1008
container_title Physical review letters
container_volume 63
creator Gurvitch, M
Valles, Jr, JM
Cucolo, AM
Dynes, RC
Garno, JP
Schneemeyer, LF
Waszczak, JV
description Tunnel junctions have been fabricated between chemically etched single crystals of YBa2Cu3O7 and evaporated metal counterelectrodes and found to exhibit reproducible characteristics. Above the bulk Tc of YBa2Cu3O7, 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 much less than Tc 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. (Author)
doi_str_mv 10.1103/PhysRevLett.63.1008
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title Reproducible tunneling data on chemically etched single crystals of YBa2Cu3O7
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