Magnetic-field dependence of the zero-bias conductance peak observed in junctions
Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506-0055, USA
Accepted: 14 October 1998
Recently, a lot of interest has been generated on the behavior of the zero-bias conductance peak (ZBCP) observed in high-Tc superconductor tunnel junctions. It is believed that the properties of the ZBCP suggest the pairing symmetry of the superconductor. The ZBCP shows interesting responses with temperature and applied fields. In this paper we report results of measurements of the ZBCP up to a magnetic field of 5 tesla. Many of our junctions use a Pb film as the counter electrode, which is superconducting when and . This provides us with a unique opportunity for studying the interaction between superconductors with different pairing symmetry.
PACS: 73.40.Gk – Tunneling / 74.50.+r – Proximity effects, weak links, tunneling phenomena, and Josephson effects / 74.80.Fp – Point contacts; SN and SNS junctions
© EDP Sciences, 1998