Induced unconventional superconductivity on the surface states of Bi₂Te₃ topological insulator.

ABSTRACT: Topological superconductivity is central to a variety of novel phenomena involving the interplay between topologically ordered phases and broken-symmetry states. The key ingredient is an unconventional order parameter, with an orbital component containing a chiral p _x  + ip _y wave term. Here we present phase-sensitive measurements, based on the quantum interference in nanoscale Josephson junctions, realized by using Bi₂Te₃ topological insulator. We demonstrate that the induced superconductivity is unconventional and consistent with a sign-changing order parameter, such as a chiral p _x  + ip _y component. The magnetic field pattern of the junctions shows a dip at zero externally applied magnetic field, which is an incontrovert

SUBMITTER: Charpentier S 

PROVIDER: S-EPMC5722924 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature