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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)

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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