Pairbreaking Without Magnetic Impurities in Disordered Superconductors
Amit K. Chattopadhyay, Richard A. Klemm, and Debanand Sa
TL;DR
This paper demonstrates that inhomogeneous pairing interactions can cause pairbreaking effects similar to magnetic impurities in disordered superconductors, without actual magnetic impurities, using a spatially varying Bogoliubov-deGennes model.
Contribution
It introduces a model showing how pairing disorder alone can induce pairbreaking and gapless states, aligning with experimental STM observations.
Findings
Reproduces Abrikosov-Gor'kov effects without magnetic impurities
Identifies bound states within the BCS gap due to pairing disorder
Matches STM measurements on cuprate superconductors with impurities
Abstract
We study analytically the effects of inhomogeneous pairing interactions in short coherence length superconductors, using a spatially varying Bogoliubov-deGennes model. Within the Born approximation, it reproduces all of the standard Abrikosov-Gor'kov pairbreaking and gaplessness effects, even in the absence of actual magnetic impurities. For pairing disorder on a single site, the T-matrix gives rise to bound states within the BCS gap. Our results are compared with recent scanning tunneling microscopy measurements on BiSrCaCuO with Zn or Ni impurities.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.