Electric field tunable superconductor-semiconductor coupling in Majorana nanowires

Michiel W.A. de Moor, Jouri D.S. Bommer, Di Xu, Georg W. Winkler, Andrey E. Antipov, Arno Bargerbos, Guanzhong Wang, Nick Van Loo, Roy L.M. op het Veld, Sasa Gazibegovic, Diana Car, John A. Logan, Mihir Pendharkar, Joon Sue Lee, Erik P.A.M. Bakkers, Chris J. Palmstrom, Roman M. Lutchyn, Leo P. Kouwenhoven, Hao Zhang

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29 Citaten (Scopus)
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Samenvatting

We study the effect of external electric fields on superconductor-semiconductor coupling by measuring the electron transport in InSb semiconductor nanowires coupled to an epitaxially grown Al superconductor. We find that the gate voltage induced electric fields can greatly modify the coupling strength, which has consequences for the proximity induced superconducting gap, effective g-factor, and spin-orbit coupling, which all play a key role in understanding Majorana physics. We further show that level repulsion due to spin-orbit coupling in a finite size system can lead to seemingly stable zero bias conductance peaks, which mimic the behavior of Majorana zero modes. Our results improve the understanding of realistic Majorana nanowire systems.

Originele taal-2Engels
Artikelnummer103049
Aantal pagina's24
TijdschriftNew Journal of Physics
Volume20
Nummer van het tijdschrift10
DOI's
StatusGepubliceerd - 31 okt 2018

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