TY - JOUR
T1 - Reproducible tunneling data on chemically etched single crystals of YBa2Cu3O7
AU - Gurvitch, M.
AU - Valles, J. M.
AU - Cucolo, A. M.
AU - Dynes, R. C.
AU - Garno, J. P.
AU - Schneemeyer, L. F.
AU - Waszczak, J. V.
PY - 1989
Y1 - 1989
N2 - We have fabricated tunnel junctions between chemically etched single crystals of YBa2Cu3O7 and evaporated metal counterelectrodes which exhibit reproducible characteristics. Above the bulk critical temperature of YBa2Cu3O7, 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 TTc there is a reproducible, finite, zero-bias conductance which suggests that there are states at the Fermi energy superconducting YBa2Cu3O7. Junctions with Pb, Sn, Bi, Sb, PbBI, and Au counterelectrodes all show qualitatively similar behavior.
AB - We have fabricated tunnel junctions between chemically etched single crystals of YBa2Cu3O7 and evaporated metal counterelectrodes which exhibit reproducible characteristics. Above the bulk critical temperature of YBa2Cu3O7, 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 TTc there is a reproducible, finite, zero-bias conductance which suggests that there are states at the Fermi energy superconducting YBa2Cu3O7. Junctions with Pb, Sn, Bi, Sb, PbBI, and Au counterelectrodes all show qualitatively similar behavior.
UR - http://www.scopus.com/inward/record.url?scp=0001519788&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.63.1008
DO - 10.1103/PhysRevLett.63.1008
M3 - Article
AN - SCOPUS:0001519788
SN - 0031-9007
VL - 63
SP - 1008
EP - 1011
JO - Physical Review Letters
JF - Physical Review Letters
IS - 9
ER -