Anomalous supercurrent from Majorana states in topological insulator Josephson junctions
Name
Potter-2013-Anomalous supercurrent.pdf
Size
510.74 KB
Format
Adobe PDF
Checksum (MD5)
ba820b0965e865daf6669cda29eba4a2
Author(s)
Potter, Andrew C.
Fu, Liang
Date Issued
September 2013
Journal
Physical Review B
Publisher
American Physical Society
Citation
Potter, Andrew C., and Liang Fu. “Anomalous Supercurrent from Majorana States in Topological Insulator Josephson Junctions.” Phys. Rev. B 88, no. 12 (September 2013). © 2013 American Physical Society
Version
Final published version
Abstract
We propose a Josephson junction setup based on a topological insulator (TI) thin film to detect Majorana states that exploits the unique helical and extended nature of the TI surface state. When the magnetic flux through the junction is close to an integer number of flux quanta, Majorana states, present on both surfaces of the film, give rise to a narrow peak-dip structure in the current-phase relation by hybridizing at the edge of the junction. Remarkably, the maximal Majorana-state contribution to Josephson current takes a (nearly) universal value, approximately equal to the supercurrent capacity of a single quantum channel. These features provide a characteristic signature of Majorana states based entirely on supercurrent.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevB.88.121109
