ac Josephson effect in superconducting d-wave junctions

Details ac Josephson effect in superconducting d-wave junctions ac Josephson effect in superconducting d-wave junctions

1998-07-06

arxiv.org/abs/cond-mat/9807081v1

Phys. Rev. B 59, 4412 (1999).

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.59.4412

We study theoretically the ac Josephson effect in superconducting planar d-wave junctions. The insulating barrier assumed to be present between the two superconductors may have arbitrary strength. Many properties of this system depend on the orientation of the d-wave superconductor: we calculate the ac components of the Josephson current. In some arrangements there is substantial negative differential conductance due to the presence of mid-gap states. We study how robust these features are to finite temperature and also comment on how the calculated current-voltage curves compare with experiments. For some other configurations (for small barrier strength) we find zero-bias conductance peaks due to multiple Andreev reflections through midgap states. Moreover, the odd ac components are strongly suppressed and even absent in some arrangements. This absence will lead to a doubling of the Josephson frequency. All these features are due to the d-wave order parameter changing sign when rotated $90^{\circ}$. Recently, there have been several theoretical reports on parallel current in the d-wave case for both the stationary Josephson junction and for the normal metal-superconductor junction. Also in our case there may appear current density parallel to the junction, and we present a few examples when this takes place. Finally, we give a fairly complete account of the method used and also discuss how numerical calculations should be performed in order to produce current-voltage curves.

Affiliated with

Also associated with

No associations

Rating

ac Josephson effect in superconducting d-wave junctions 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 ac Josephson effect in superconducting d-wave junctions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ac Josephson effect in superconducting d-wave junctions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-346666