Charge Transport in Junctions between D-Wave Superconductors

Details Charge Transport in Junctions between D-Wave Superconductors Charge Transport in Junctions between D-Wave Superconductors

1994-11-25

arxiv.org/abs/cond-mat/9411104v1

Physics

Condensed Matter

32 pages, revtex, 8 postscript figures available on request

Scientific paper

10.1103/PhysRevB.52.665

We develop a microscopic analysis of superconducting and dissipative currents in junctions between superconductors with d-wave symmetry of the order parameter. We study the proximity effect in such superconductors and show that for certain crystal orientations the superconducting order parameter can be essentially suppressed in the vicinity of a nontransparent specularly reflecting boundary. This effect strongly influences the value and the angular dependence of the dc Josephson current $j_S$. At $T \sim T_c $ it leads to a crossover between $j_S \propto T_c-T$ and $j_S \propto (T_c-T)^2$ respectively for homogeneous and nonhomogeneous distribution of the order parameter in the vicinity of a tunnel junction. We show that at low temperatures the current-phase relation $j_S(\varphi )$ for SNS junctions and short weak links between d-wave superconductors is essentially nonharmonic and contains a discontinuity at $\varphi =0$. This leads to further interesting features of such systems which can be used for novel pairing symmetry tests in high temperature superconductors (HTSC). We also investigated the low temperature I-V curves of NS and SS tunnel junctions and demonstrated that depending on the junction type and crystal orientation these curves show zero-bias anomalies $I\propto V^2$, $I\propto V^2\ln (1/V)$ and $I\propto V^3$ caused by the gapless behavior of the order parameter in d-wave superconductors. Many of our results agree well with recent experimental findings for HTSC compounds.

Affiliated with

Also associated with

No associations

Rating

Charge Transport in Junctions between D-Wave Superconductors does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Charge Transport in Junctions between D-Wave Superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Charge Transport in Junctions between D-Wave Superconductors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-177397