Gate-Defined Topological Josephson Junctions in Bernal Bilayer Graphene

Ying-Ming Xie; Étienne Lantagne-Hurtubise; Andrea F. Young; Stevan Nadj-Perge; Jason Alicea

doi:10.1103/PhysRevLett.131.146601

← Back to search

Gate-Defined Topological Josephson Junctions in Bernal Bilayer Graphene

Ying-Ming Xie, Étienne Lantagne-Hurtubise, Andrea F. Young, Stevan Nadj-Perge, Jason Alicea

DOI 10.1103/PhysRevLett.131.146601 · Physical Review Letters

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

Recent experiments on Bernal bilayer graphene (BLG) deposited on monolayer WSe2 revealed robust, ultraclean superconductivity coexisting with sizable induced spin-orbit coupling. Here, we propose BLG/WSe2 as a platform to engineer gate-defined planar topological Josephson junctions, where the normal and superconducting regions descend from a common material. More precisely, we show that if superconductivity in BLG/WSe2 is gapped and emerges from a parent state with intervalley coherence, then Majorana zero-energy modes can form in the barrier region upon applying weak in-plane magnetic fields. Our results spotlight a potential pathway for “internally engineered” topological superconductivity that minimizes detrimental disorder and orbital-magnetic-field effects.