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Showing 1–5 of 5 results
Advanced filters: Author: Philipp Leubner Clear advanced filters

  • Quantum spin Hall edge states are protected by time-reversal symmetry and are expected to disappear in a strong magnetic field. Here, the authors use microwave impedance microscopy and find, surprisingly, edge conduction in mercury telluride quantum wells that survives up to 9 T with little change.

    • Eric Yue Ma
    • M. Reyes Calvo
    • Zhi-Xun Shen
    ResearchOpen Access
    Nature Communications
    Volume: 6, P: 1-6

  • Quantum wells based on mercury telluride are an experimental realization of a two-dimensional topological insulator. By using a scanning superconducting quantum interference device (SQUID) technique, the magnetic fields flowing through HgTe/CdTe heterostructures are imaged both in the quantum spin Hall and the trivial regimes, revealing the edge states associated with the quantum spin Hall state.

    • Katja C. Nowack
    • Eric M. Spanton
    • Kathryn A. Moler
    Research
    Nature Materials
    Volume: 12, P: 787-791

  • Majorana fermions, which are their own antiparticles, are expected to exist in topological superconductors. A study using superconducting leads in contact with a quantum well reveals the presence of supercurrents along one-dimensional sample edges of a quantum spin Hall state. These edge supercurrents are topological.

    • Sean Hart
    • Hechen Ren
    • Amir Yacoby
    Research
    Nature Physics
    Volume: 10, P: 638-643

  • A Josephson junction with a weak link made of the quantum spin Hall insulator HgTe shows evidence of topological superconductivity in response to an a.c. excitation.

    • Erwann Bocquillon
    • Russell S. Deacon
    • Laurens W. Molenkamp
    Research
    Nature Nanotechnology
    Volume: 12, P: 137-143