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

Deng, M. T. LU ; Vaitiekenas, S.; Hansen, E. B.; Danon, J.; Leijnse, M. LU ; Flensberg, K.; Nygård, J. LU ; Krogstrup, P. and Marcus, C. M. (2016) In Science 354(6319). p.1557-1562
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... (More)

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.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Science
volume
354
issue
6319
pages
6 pages
publisher
The American Association for the Advancement of Science
external identifiers
  • scopus:85007137353
  • wos:000390254300045
ISSN
0036-8075
DOI
10.1126/science.aaf3961
language
English
LU publication?
yes
id
a253541d-d081-4b28-960a-4a112d608c0c
date added to LUP
2017-01-13 07:58:45
date last changed
2017-11-19 04:36:41
@article{a253541d-d081-4b28-960a-4a112d608c0c,
  abstract     = {<p>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.</p>},
  author       = {Deng, M. T. and Vaitiekenas, S. and Hansen, E. B. and Danon, J. and Leijnse, M. and Flensberg, K. and Nygård, J. and Krogstrup, P. and Marcus, C. M.},
  issn         = {0036-8075},
  language     = {eng},
  month        = {12},
  number       = {6319},
  pages        = {1557--1562},
  publisher    = {The American Association for the Advancement of Science},
  series       = {Science},
  title        = {Majorana bound state in a coupled quantum-dot hybrid-nanowire system},
  url          = {http://dx.doi.org/10.1126/science.aaf3961},
  volume       = {354},
  year         = {2016},
}