Josephson supercurrent through a topological insulator surface state.

@article{Veldhorst2012JosephsonST,
  title={Josephson supercurrent through a topological insulator surface state.},
  author={Menno Veldhorst and Marieke Snelder and Mandy van Hoek and Tian Gang and V. K. Guduru and X. L. Wang and Uli Zeitler and Wilfred G. van der Wiel and A A Golubov and Hans Hilgenkamp and Alexander Brinkman},
  journal={Nature materials},
  year={2012},
  volume={11 5},
  pages={
          417-21
        }
}
The long-sought yet elusive Majorana fermion is predicted to arise from a combination of a superconductor and a topological insulator. An essential step in the hunt for this emergent particle is the unequivocal observation of supercurrent in a topological phase. Here, direct evidence for Josephson supercurrents in superconductor (Nb)-topological insulator (Bi(2)Te(3))-superconductor electron-beam fabricated junctions is provided by the observation of clear Shapiro steps under microwave… 
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