Suppression of low-energy Andreev states by a supercurrent in YBa_2Cu_3O_7-delta

Details Suppression of low-energy Andreev states by a supercurrent in YBa_2Cu_3O_7-delta Suppression of low-energy Andreev states by a supercurrent in YBa_2Cu_3O_7-delta

2005-05-28

arxiv.org/abs/cond-mat/0505691v1

Physics

Condensed Matter

Superconductivity

6 pages, 4 figures, to appear in Physical Review B

Scientific paper

10.1103/PhysRevB.72.054513

We report a coherence-length scale phenomenon related to how the high-Tc order parameter (OP) evolves under a directly-applied supercurrent. Scanning tunneling spectroscopy was performed on current-carrying YBa_2Cu_3O_7-delta thin-film strips at 4.2K. At current levels well below the theoretical depairing limit, the low-energy Andreev states are suppressed by the supercurrent, while the gap-like structures remain unchanged. We rule out the likelihood of various extrinsic effects, and propose instead a model based on phase fluctuations in the d-wave BTK formalism to explain the suppression. Our results suggest that a supercurrent could weaken the local phase coherence while preserving the pairing amplitude. Other possible scenarios which may cause the observed phenomenon are also discussed.

Affiliated with

Also associated with

No associations

Rating

Suppression of low-energy Andreev states by a supercurrent in YBa_2Cu_3O_7-delta 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 Suppression of low-energy Andreev states by a supercurrent in YBa_2Cu_3O_7-delta, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Suppression of low-energy Andreev states by a supercurrent in YBa_2Cu_3O_7-delta will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-80283