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

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

doi:10.1126/science.aaf3961

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

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

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504 Citationer (Scopus)

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.

Originalsprog	Engelsk
Tidsskrift	Science
Vol/bind	354
Udgave nummer	6319
Sider (fra-til)	1157-1562
ISSN	0036-8075
DOI	https://doi.org/10.1126/science.aaf3961
Status	Udgivet - 23 dec. 2016

Emneord

cond-mat.mes-hall
cond-mat.supr-con
quant-ph

Adgang til dokumentet

10.1126/science.aaf3961

1557.full(1)Forlagets udgivne version, 1,22 MB

Citationsformater

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T1 - Majorana bound states in a coupled quantum-dot hybrid-nanowire system

AU - Deng, M. T.

AU - Vaitiekenas, S.

AU - Hansen, E. B.

AU - Danon, J.

AU - Leijnse, M.

AU - Flensberg, K.

AU - Nygård, J.

AU - Krogstrup, P.

AU - Marcus, C. M.

N1 - [Qdev]

PY - 2016/12/23

Y1 - 2016/12/23

N2 - 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.

AB - 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.

KW - cond-mat.mes-hall

KW - cond-mat.supr-con

KW - quant-ph

U2 - 10.1126/science.aaf3961

DO - 10.1126/science.aaf3961

M3 - Journal article

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VL - 354

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EP - 1562

JO - Science

JF - Science

IS - 6319

ER -

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

Abstract

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