Mesoscopic Fluctuations of Conductance in Topological Crystalline Insulators

ORAL

Abstract

Topological crystalline insulators (TCI) offer a path to topological states of matter with a distinct character compared to time-reversal invariant topological insulators. Recent work by our group [arxiv.org/abs/1710.06077] suggests the possibility of disorder-induced helical modes in Pb1-xSnxTe Josephson junctions. To further investigate these modes, we fabricate Pb1-xSnxTe devices to measure mesoscopic fluctuations of conductance. Reports of the universal conductance fluctuations and nonlocal conductance will be given as a function of Sn doping on either side of the topological phase transition known to exist at x~0.75.

*This work was sponsored by the grants National Science Foundation Physics Frontier Center at the Joint Quantum Institute (PHY-1430094) and the Army Research Office (W911NF1710027).

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Presenters

  • Rodney Snyder

    • Univ of Maryland-College Park

Authors

  • Rodney Snyder

    • Univ of Maryland-College Park

  • Christie Trimble

    • Univ of Maryland-College Park

  • Samuel Deitemyer

    • Univ of Maryland-College Park

  • Charles Rong

    • Army Research Lab

  • Patrick Folkes

    • Army Research Lab

  • Patrick Taylor

    • Army Research Lab

  • James Williams

    • Univ of Maryland-College Park