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Portrait of Martin Leijnse; Photo: Kennet Ruona

Martin Leijnse

Professor, Member of NanoLund Management Group

Portrait of Martin Leijnse; Photo: Kennet Ruona

Majorana bound state in a coupled quantum-dot hybrid-nanowire system

Author

  • M. T. Deng
  • S. Vaitiekenas
  • E. B. Hansen
  • J. Danon
  • M. Leijnse
  • K. Flensberg
  • J. Nygård
  • P. Krogstrup
  • C. M. Marcus

Summary, in English

Hybrid nanowires combining semiconductor and superconductor materials appear well suited for the creation, detection, and control of Majorana bound states (MBSs). We demonstrate the emergence of MBSs from coalescing Andreev bound states (ABSs) in a hybrid InAs nanowire with epitaxial Al, using a quantum dot at the end of the nanowire as a spectrometer. Electrostatic gating tuned the nanowire density to a regime of one or a few ABSs. In an applied axial magnetic field, a topological phase emerges in which ABSs move to zero energy and remain there, forming MBSs. We observed hybridization of the MBS with the end-dot bound state, which is in agreement with a numerical model. The ABS/MBS spectra provide parameters that are useful for understanding topological superconductivity in this system.

Department/s

  • Solid State Physics
  • NanoLund: Center for Nanoscience

Publishing year

2016-12-23

Language

English

Pages

1557-1562

Publication/Series

Science

Volume

354

Issue

6319

Document type

Journal article

Publisher

American Association for the Advancement of Science

Topic

  • Physical Sciences

Status

Published

ISBN/ISSN/Other

  • ISSN: 0036-8075