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

Condensed Matter Physics

504 Citations (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.

Original language	English
Journal	Science
Volume	354
Issue number	6319
Pages (from-to)	1157-1562
ISSN	0036-8075
DOIs	https://doi.org/10.1126/science.aaf3961
Publication status	Published - 23 Dec 2016

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title = "Majorana bound states in a coupled quantum-dot hybrid-nanowire system",

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.",

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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.

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PY - 2016/12/23

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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

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ER -

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

Abstract

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