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

Research output: Contribution to journalArticle

Abstract

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.

Details

Authors
  • M. T. Deng
  • S. Vaitiekenas
  • E. B. Hansen
  • J. Danon
  • M. Leijnse
  • K. Flensberg
  • J. Nygård
  • P. Krogstrup
  • C. M. Marcus
Organisations
External organisations
  • National University of Defense Technology
  • University of Copenhagen
  • Free University of Berlin
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Physical Sciences
Original languageEnglish
Pages (from-to)1557-1562
Number of pages6
JournalScience
Volume354
Issue number6319
Publication statusPublished - 2016 Dec 23
Publication categoryResearch
Peer-reviewedYes