Electric Field Tunable Superconductor-semiconductor Coupling in Majorana Nanowires
ORAL
Abstract
Hybrid semiconductor nanowire-superconductor systems have attracted interest in recent years as possible platforms for hosting Majorana Zero Modes (MZM). Although this system has been extensively studied both theoretically and experimentally, it has recently become clear that the effective parameters of the system depend strongly on the electrostatic environment. We use InSb nanowires with epitaxially grown Al superconductor to study the effect of electrostatic gating on device parameters such as the superconducting gap and the effective g-factor. We find that the induced superconducting gap as well as the effective Zeeman g-factor changes as the device is tuned from strong coupling to weak coupling, which is corroborated by Schrödinger-Poisson simulations of the device geometry. We further investigate the effect this has on the phase diagram of Zero Bias Conductance Peaks (ZBCP), which are generally considered as a signature of MZM.
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Presenters
Michiel De Moor
QuTech and Kavli Institute of Nanoscience, Delft University of Technology
Authors
Michiel De Moor
QuTech and Kavli Institute of Nanoscience, Delft University of Technology
Di Xu
Delft Univ of Tech
QuTech and Kavli Institute of Nanoscience, Delft University of Technology
Jouri Bommer
Delft Univ of Tech
QuTech and Kavli Institute of Nanoscience, Delft University of Technology
Hao Zhang
QuTech and Kavli Institute of Nanoscience, Delft University of Technology
Arno Bargerbos
TU Delft
QuTech and Kavli Institute of Nanoscience, Delft University of Technology
Georg Winkler
Department of Physics, ETH Zurich
Theoretical Physics and Station Q, ETH Zurich
Andrey Antipov
Station Q, Microsoft Research
Microsoft Station Q
Guanzhong Wang
Delft Univ of Tech
QuTech and Kavli Institute of Nanoscience, Delft University of Technology
Nick van Loo
Delft Univ of Tech
QuTech and Kavli Institute of Nanoscience, Delft University of Technology
Roy Op het Veld
Eindhoven Univ of Tech
Department of Applied Physics, Eindhoven University of Technology
Eindhoven University of Technology
Sasa Gazibegovic
Department of Applied Physics, Eindhoven University of Technology
Eindhoven Univ of Tech
Eindhoven University of Technology
Diana Car
Eindhoven Univ of Tech
Department of Applied Physics, Eindhoven University of Technology
Eindhoven University of Technology
John Logan
University of California Santa Barbara
Materials Department, University of California
University of California-Santa Barbara
University of California - Santa Barbara
Chris Palmstrom
University of California Santa Barbara
Materials Department, California NanoSystems Institute, Electrical and Computer Engineering, University of California
University of California-Santa Barbara
California Nanosystems Institute, Dept. of Electrical and Computer Engineering, and Dept. of Materials, Univ of California - Santa Barbara
University of California - Santa Barbara
Electronics & Computer Enginneering, University of California Santa Barbara
Materials Department, University of California, Santa Barbara
Materials, University of California Santa Barbara
Univ of California - Santa Barbara
Roman Lutchyn
Microsoft Station Q
Station Q, Microsoft Research
Microsoft Station Q Santa Barbara
Station Q, Microsoft Corp
Microsoft Corp
Erik Bakkers
Eindhoven Univ of Tech
Department of Applied Physics, Eindhoven University of Technology
Eindhoven University of Technology
Leo Kouwenhoven
Microsoft Station-Q Delft, Delft University of Technology
Delft Univ of Tech
Qutech and Kavli Institute of Nanoscience and Microsoft Station Q Delft, Delft University of Technology
QuTech, Kavli Institute of Nanoscience, Station Q at Delft University of Technology, Delft University of Technology
Microsoft Station-Q at Delft University of Technology
