Subgap conductance features of YBa2Cu3O7−δ edge Josephson junctions

A. Engelhardt; R. Dittmann; A. I. Braginski

doi:10.1103/PhysRevB.59.3815

← Back to search

Subgap conductance features of YBa2Cu3O7−δ edge Josephson junctions

A. Engelhardt, R. Dittmann, A. I. Braginski

DOI 10.1103/PhysRevB.59.3815 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

The differential conductance of YBa2Cu3O7−δ edge junctions with a PrBa2Cu2.9O7−δ barrier has been investigated in detail. One striking property of our edge junctions is the existence of a well pronounced, symmetric subharmonic gap structure which is observed in the differential conductance. These features can be explained by multiple Andreev reflections if we assume the existence of a second peak in the density of states. Furthermore, a zero-bias peak in the conductivity was observed in some of the junctions, which may be explained by Andreev bound states at the interface of a d-wave superconductor.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown