Robust Fabry-Perot interference in dual-gated Bi${}_2$Se${}_3$ devices

Abstract

We study Fabry-Perot interference in hybrid devices, each consisting of a mesoscopic superconducting disk deposited on the surface of a three-dimensional topological insulator. Such structures are hypothesized to contain protected zero modes known as Majorana fermions bound to vortices. The interference manifests as periodic conductance oscillations of magnitude $\sim 0.1$ $e^2/h$. These oscillations show no strong dependence on bulk carrier density or sample thickness, suggesting that they result from phase coherent transport in surface states. However, the Fabry-Perot interference can be tuned by both top and back gates, implying strong electrostatic coupling between the top and bottom surfaces of topological insulator.

5 pages, 3 figures. Accepted by Appl. Phys. Lett

References in corpus (13)

• Non-Abelian Anyons and Topological Quantum Computation
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• Colloquium: Majorana Fermions in nuclear, particle and solid-state physics
• Specular Andreev reflection in graphene
• Phase Coherent Transport of Charges in Graphene Quantum Billiard
• Electrically detected interferometry of Majorana fermions in a topological insulator
• Topological origin of subgap conductance in insulating bilayer graphene
• Two-dimensional Dirac fermions in a topological insulator: transport in the quantum limit
• Coexistence of the topological state and a two-dimensional electron gas on the surface of Bi2Se3
• Multi-mode Fabry-Pérot conductance oscillations in suspended stacking-faults-free InAs nanowires
• Dynamical Gate Tunable Supercurrents in Topological Josephson Junctions
• Phase Coherence and Andreev Reflection in Topological Insulator Devices

Cited by in corpus (7)

• Long-Range Propagation and Interference of $d$-wave Superconducting Pairs in Graphene
• Size Constraints on Majorana Beamsplitter Interferometer: Majorana Coupling and Surface-Bulk Scattering
• Fabry-Pérot resonant vortices and magnetoconductance in topological insulator constrictions with magnetic barriers
• Gapless helical superconductivity on the surface of a three-dimensional topological insulator
• Conduction spectroscopy of a proximity induced superconducting topological insulator
• Scanning tunneling microscopy of superconducting topological surface states in Bi${}_2$Se${}_3$
• Hybridization mechanism of the dual proximity effect in superconductor-topological insulator interfaces