End-to-end correlated subgap states in hybrid nanowires

G. L. R. Anselmetti, E. A. Martinez, G. C. Ménard, D. Puglia, F. K. Malinowski, J. S. Lee, S. Choi, M. Pendharkar, C. J. Palmstrøm, C. M. Marcus, L. Casparis, and A. P. Higginbotham
Phys. Rev. B 100, 205412 – Published 12 November 2019
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Abstract

End-to-end correlated bound states are investigated in superconductor-semiconductor hybrid nanowires at zero magnetic field. Peaks in subgap conductance are independently identified from each wire end, and a cross-correlation function is computed that counts end-to-end coincidences, averaging over thousands of subgap features. Strong correlations in a short, 300-nm device are reduced by a factor of 4 in a long, 900-nm device. In addition, subgap conductance distributions are investigated, and correlations between the left and right distributions are identified based on their mutual information.

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  • Received 4 August 2019
  • Revised 24 October 2019

DOI:https://doi.org/10.1103/PhysRevB.100.205412

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

G. L. R. Anselmetti1, E. A. Martinez1, G. C. Ménard1, D. Puglia1, F. K. Malinowski1, J. S. Lee2, S. Choi3, M. Pendharkar3, C. J. Palmstrøm2,3,4, C. M. Marcus1, L. Casparis1,*, and A. P. Higginbotham1,5,†

  • 1Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, and Microsoft Quantum – Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
  • 2California NanoSystems Institute, University of California, Santa Barbara, Santa Barbara, California 93106, USA
  • 3Department of Electrical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, USA
  • 4Materials Department, University of California, Santa Barbara, Santa Barbara, California 93106, USA
  • 5Institute of Science and Technology Austria, 3400 Klosterneuburg, Austria

  • *lucas.casparis@microsoft.com
  • andrew.higginbotham@ist.ac.at

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Issue

Vol. 100, Iss. 20 — 15 November 2019

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