Chiral nodes and oscillations in the Josephson current in Weyl semimetals

Udit Khanna, Dibya Kanti Mukherjee, Arijit Kundu, Sumathi Rao

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

The separation of the Weyl nodes in a broken time-reversal symmetric Weyl semimetal leads to helical quasiparticle excitations at the Weyl nodes which, when coupled with overall spin conservation, allows only internodal transport at the junction of the Weyl semimetal with a superconductor. This leads to an unusual periodic oscillation in the Josephson current as a function of k0L, where L is the length of the Weyl semimetal and 2k0 is the internodal distance. This oscillation is robust and should be experimentally measurable, providing a direct path to confirming the existence of chiral nodes in the Weyl semimetal.

Original languageEnglish
Article number121409
JournalPhysical Review B
Volume93
Issue number12
DOIs
StatePublished - 23 Mar 2016
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2016 American Physical Society.

Funding

FundersFunder number
National Science Foundation
Directorate for Mathematical and Physical Sciences1350663

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