Ubiquitous non-Majorana zero-bias conductance peaks in nanowire devices

J. Chen, B.D. Woods, P. Yu, Moïra Hocevar, D. Car, S.R. Plissard, E.P.A.M. Bakkers, T.D. Stanescu, S.M. Frolov (Corresponding author)

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We perform tunneling measurements on indium antimonide nanowire-superconductor hybrid devices fabricated for the studies of Majorana bound states. At finite magnetic field, resonances that strongly resemble Majorana bound states, including zero-bias pinning, become common to the point of ubiquity. Since Majorana bound states are predicted in only a limited parameter range in nanowire devices, we seek an alternative explanation for the observed zero-bias peaks. With the help of a self-consistent Poission-Schrödinger multiband model developed in parallel, we identify several families of trivial subgap states that overlap and interact, giving rise to a crowded spectrum near zero energy and zero-bias conductance peaks in experiments. These findings advance the search for Majorana bound states through improved understanding of broader phenomena found in superconductor-semiconductor systems.

Originele taal-2Engels
Artikelnummer107703
Aantal pagina's6
TijdschriftPhysical Review Letters
Volume123
Nummer van het tijdschrift10
DOI's
StatusGepubliceerd - 6 sep 2019

Vingerafdruk

nanowires
indium
magnetic fields
energy

Citeer dit

Chen, J., Woods, B. D., Yu, P., Hocevar, M., Car, D., Plissard, S. R., ... Frolov, S. M. (2019). Ubiquitous non-Majorana zero-bias conductance peaks in nanowire devices. Physical Review Letters, 123(10), [107703]. https://doi.org/10.1103/PhysRevLett.123.107703
Chen, J. ; Woods, B.D. ; Yu, P. ; Hocevar, Moïra ; Car, D. ; Plissard, S.R. ; Bakkers, E.P.A.M. ; Stanescu, T.D. ; Frolov, S.M. / Ubiquitous non-Majorana zero-bias conductance peaks in nanowire devices. In: Physical Review Letters. 2019 ; Vol. 123, Nr. 10.
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abstract = "We perform tunneling measurements on indium antimonide nanowire-superconductor hybrid devices fabricated for the studies of Majorana bound states. At finite magnetic field, resonances that strongly resemble Majorana bound states, including zero-bias pinning, become common to the point of ubiquity. Since Majorana bound states are predicted in only a limited parameter range in nanowire devices, we seek an alternative explanation for the observed zero-bias peaks. With the help of a self-consistent Poission-Schr{\"o}dinger multiband model developed in parallel, we identify several families of trivial subgap states that overlap and interact, giving rise to a crowded spectrum near zero energy and zero-bias conductance peaks in experiments. These findings advance the search for Majorana bound states through improved understanding of broader phenomena found in superconductor-semiconductor systems.",
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Chen, J, Woods, BD, Yu, P, Hocevar, M, Car, D, Plissard, SR, Bakkers, EPAM, Stanescu, TD & Frolov, SM 2019, 'Ubiquitous non-Majorana zero-bias conductance peaks in nanowire devices', Physical Review Letters, vol. 123, nr. 10, 107703. https://doi.org/10.1103/PhysRevLett.123.107703

Ubiquitous non-Majorana zero-bias conductance peaks in nanowire devices. / Chen, J.; Woods, B.D.; Yu, P.; Hocevar, Moïra; Car, D.; Plissard, S.R.; Bakkers, E.P.A.M.; Stanescu, T.D.; Frolov, S.M. (Corresponding author).

In: Physical Review Letters, Vol. 123, Nr. 10, 107703, 06.09.2019.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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