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
Aantal pagina's6
TijdschriftPhysical Review Letters
Nummer van het tijdschrift10
StatusGepubliceerd - 6 sep 2019

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    Chen, J., Woods, B. D., Yu, P., Hocevar, M., Car, D., Plissard, S. R., Bakkers, E. P. A. M., Stanescu, T. D., & 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