Interfacial effects of proximitizing superconductivity in topological insulators

ORAL

Abstract

The proximitization of superconductivity into time-reversal invariant topological insulators, as well as their magnetic counterparts, has produced exciting observations including anomalous Fraunhofer patterns[1, 2], finite momentum pairing[3], and fractional quantized conductances[4]. Yet even as the quality of topological materials rapidly improves, variations in behavior across different experiments and groups are not well understood. We postulate that the properties of the interface between superconducting metals and topological insulators play a key role, and we discuss our attempts to characterize and manipulate such interfaces, focusing on the (BiSb)2Te3 family of topological insulators.

[1] Williams, J. R., et al. Phys. Rev. Lett. 109, 056803 (2012)
[2] Ghatak, S. et al. Nano Lett. 18, 5124-5131 (2018)
[3] Chen, A. Q., et al. Nature Comm. 9, 3478 (2018)
[4] He, Q. L., et al. Science 357, 294-299 (2017)

*Research supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division, under Contract DE-AC02-76SF00515.

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Presenters

  • Ilan Rosen

    • Stanford Univ

Authors

  • Ilan Rosen

    • Stanford Univ

  • Molly P Andersen

    • Stanford Univ

  • Linsey Rodenbach

    • Stanford Univ

  • Peng Zhang

    • UCLA
    • Electrical and Computer Engineering, University of California, Los Angeles
    • Department of Electrical Engineering, University of California Los Angeles

  • Lixuan Tai

    • UCLA

  • Gen Yin

    • Department of Electrical and Computer Engineering, University of California, Los Angeles
    • UCLA

  • Marc A. Kastner

    • Stanford Univ

  • Kang L. Wang

    • Department of Electrical and Computer Engineering, University of California, Los Angeles
    • UCLA
    • Department of Electrical Engineering, University of California Los Angeles
    • University of California at Los Angeles

  • David Goldhaber-Gordon

    • Stanford Univ
    • Physics, Stanford University
    • Stanford
    • Department of Physics, Stanford University