Andreev bound states and Josephson coupling in YBa$_2$Cu$_3$O$_7$/Pb tunnel junctions - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Conference Papers Journal of Low Temperature Physics Year : 1999

Andreev bound states and Josephson coupling in YBa$_2$Cu$_3$O$_7$/Pb tunnel junctions

Abstract

We have made in-situ [103] and [110]YBCO/Pb junctions, which display an hysteretic behaviour with both a well-defined Quasi-Particule branch and a Josephson current. A zero energy conductance peak is observed in the tunneling conductance — which is a signature of Andreev Bound States (ABS) at a surface of a d-wave superconductor — which splits at low temperature. This may confirm the existence of a surface state which breaks time-reversal symmetry. However, up to now, we have not seen any evidence of a coupling between Josephson current and the zero-energy ABS, predicted by Y. Tanaka and S. Kashiwaya 1

Dates and versions

in2p3-00003852 , version 1 (28-02-2007)

Identifiers

Cite

J. Lesueur, X. Grison, M. Aprili, T. Kontos. Andreev bound states and Josephson coupling in YBa$_2$Cu$_3$O$_7$/Pb tunnel junctions. International Conference on Physics and Chemistry of Molecular and Oxide Superconductors, MOS-99, Jul 1999, Stockholm, Sweden. pp.539-543, ⟨10.1023/A:1022579313630⟩. ⟨in2p3-00003852⟩
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