Gate-Defined Topological Josephson Junctions in Bernal Bilayer Graphene

Abstract

Recent experiments on Bernal bilayer graphene (BLG) deposited on monolayer WSe${}_2$ revealed robust, ultra-clean superconductivity coexisting with sizable induced spin-orbit coupling. Here we propose BLG/WSe${}_2$ 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/WSe${}_2$ is gapped and emerges from a parent state with inter-valley coherence, then Majorana zero 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.

7 pages, 4 figures, plus supplementary material

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Cited by in corpus (16)

• Correlated Phases in Spin-Orbit-Coupled Rhombohedral Trilayer Graphene
• Topological superconductivity in Fibonacci quasicrystals
• Symmetry-broken metallic orders in spin-orbit-coupled Bernal bilayer graphene
• Majorana zero modes in twisted transition metal dichalcogenides homobilayers
• Andreev bound states and supercurrent in an unconventional superconductor-altermagnetic Josephson junction
• Anomalous $h/2e$ periodicity and Majorana zero modes in chiral Josephson junctions
• Microwave Signatures of Topological Superconductivity in Planar Josephson Junctions
• Mirror-protected Majorana zero modes in $f$-wave multilayer graphene superconductors
• Probing valley phenomena with gate-defined valley splitters
• Identifying Majorana Zero Modes in Vortex Lattices Using Fano Factor Tomography
• Magnetic field-free braiding and nontrivial fusion of Majorana bound states in high-temperature planar Josephson junctions
• Chiral adiabatic transmission protected by Fermi surface topology
• Gapfull and gapless $1$D Topological Superconductivity in Spin-Orbit Coupled Bilayer Graphene
• Topological superconductivity and superconducting diode effect mediated via unconventional magnet and Ising spin-orbit coupling
• Anisotropic supercurrent suppression and revivals in a graphene-based Josephson junction under in-plane magnetic fields
• Building 3D superconductor-based Josephson junctions using a via transfer approach