Interface effect and tunneling conductance of a normal metal/d-wave superconductor junction

• Published in: Physica. C, Superconductivity Vol. 362; no. 1; pp. 219 - 223
• Main Authors: Tanuma, Y., Tanaka, Y., Kashiwaya, S.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.09.2001
• Subjects: Broken time reversal symmetry; d-wave superconductor; Tunneling conductance; Zero-bias conductance peak; Broken time reversal symmetry; 74.20.−z; d-wave superconductor; Zero-bias conductance peak; 74.50.+r; Tunneling conductance
• ISSN: 0921-4534; 1873-2143
• DOI: 10.1016/S0921-4534(01)00674-8

The interface effect on the broken time reversal symmetry state formed at the interface of normal metal/d-wave superconductor junctions is studied on the basis of the quasiclassical Green's function method. The magnitude of the induced subdominant s-wave component of the pair potential which breaks time reversal symmetry is reduced with the increase of the magnitude of the transparency of the junctions. We also present tunneling conductance spectra in the junction based on the self-consistently determined pair potential where the zero-bias conductance peak (ZBCP) is split due to the s-wave component. Whether the splitting of ZBCP is observed or not in actual experiments strongly depends on the transparency of the junctions.