Josephson effect and triplet-singlet ratio of noncentrosymmetric superconductors

We calculate the Andreev bound states and the corresponding Josephson current for an asymmetric two-dimensional Josephson junction by solving Bogoliubov-de Gennes equations. The junction consists of a noncentrosymmetric superconductor (NCS) separated by a tunneling barrier with a variable height to...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2014-05, Vol.89 (17), Article 174505
Main Authors: Klam, Ludwig, Epp, Anthony, Chen, Wei, Sigrist, Manfred, Manske, Dirk
Format: Article
Language:English
Subjects:
Asymmetry
Condensed matter
Constraining
Josephson effect
Mathematical analysis
Spin-orbit interactions
Superconductor junctions
Superconductors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We calculate the Andreev bound states and the corresponding Josephson current for an asymmetric two-dimensional Josephson junction by solving Bogoliubov-de Gennes equations. The junction consists of a noncentrosymmetric superconductor (NCS) separated by a tunneling barrier with a variable height to a conventional s-wave superconductor. In addition to the antisymmetric spin-orbit coupling in the NCS on the one side, this asymmetric junction gives rise to a Rashba spin-orbit coupling at the interface. We explore the rich parameter space and recover various limiting cases such as s-wave/p-wave junction and the asymmetric s-wave junctions. In addition, we report a transition from a 0 junction to a [pi]/2 junction with increasing triplet-singlet pairing ratio of the NCS, which serves as a mechanism to determine the unknown ratio in a variety of NCS's.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.89.174505