TY - JOUR
T1 - Tunneling spectroscopy of the quasiparticle Andreev bound state in ion-irradiated/Pb junctions
AU - Aprili, M.
AU - Covington, M.
AU - Paraoanu, E.
AU - Niedermeier, B.
AU - Greene, L.
PY - 1998
Y1 - 1998
N2 - Effects of disorder on the in-plane density of states of YBa2Cu3O7-δ are investigated by planar tunneling spectroscopy. Low-fluence 1-MeV He+ irradiation reduces the YBa2Cu3O7-δ Tc and mean-free path without altering the junction quality. As the dirty limit is approached, the zero-bias conductance peak (ZBCP) disappears, as expected for a quasiparticle Andreev bound state. Thus, the quasiparticle scattering rate may be determined by the ZBCP magnitude. This rate is a direct measure of the pair-breaking strength and accounts for the Tc suppression.
AB - Effects of disorder on the in-plane density of states of YBa2Cu3O7-δ are investigated by planar tunneling spectroscopy. Low-fluence 1-MeV He+ irradiation reduces the YBa2Cu3O7-δ Tc and mean-free path without altering the junction quality. As the dirty limit is approached, the zero-bias conductance peak (ZBCP) disappears, as expected for a quasiparticle Andreev bound state. Thus, the quasiparticle scattering rate may be determined by the ZBCP magnitude. This rate is a direct measure of the pair-breaking strength and accounts for the Tc suppression.
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U2 - 10.1103/PhysRevB.57.R8139
DO - 10.1103/PhysRevB.57.R8139
M3 - Article
AN - SCOPUS:0000966382
SN - 1098-0121
VL - 57
SP - R8139-R8142
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 14
ER -