Probing the helical edge states of a topological insulator by Cooper-pair injection
P. Adroguer, C. Grenier, D. Carpentier, J. Cayssol, P. Degiovanni and, E. Orignac
TL;DR
This paper investigates the interaction between a superconductor and the edge states of a topological insulator, revealing perfect Andreev reflection and suppressed nonlocal processes, with detailed conductance and noise analysis.
Contribution
It demonstrates the nature of Andreev reflection at a QSH edge/superconductor interface and characterizes the conductance and noise properties of this system.
Findings
Perfect Andreev reflection at the QSH edge/superconductor interface
Suppression of nonlocal Andreev processes
Quantitative conductance and noise results
Abstract
We consider the proximity effect between a singlet s-wave superconductor and the edge of a Quantum Spin Hall (QSH) topological insulator. We establish that Andreev reflection at a QSH edge state/superconductor interface is perfect while nonlocal Andreev processes through the superconductor are totally suppressed. We compute the corresponding conductance and noise.
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.