Weak-link Josephson Junctions Made from Topological Crystalline Insulators

R. A. Snyder; C. J. Trimble; C. C. Rong; P. A. Folkes; P. J. Taylor; J. R. Williams

doi:10.1103/PhysRevLett.121.097701

Weak-link Josephson Junctions Made from Topological Crystalline Insulators

Mesoscale and Nanoscale Physics 2018-09-12 v3

Authors: R. A. Snyder , C. J. Trimble , C. C. Rong , P. A. Folkes , P. J. Taylor , J. R. Williams

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Abstract

We report on the fabrication of Josephson junctions using the topological crystalline insulator Pb $_{0.5}$ Sn $_{0.5}$ Te as the weak link. The properties of these junctions are characterized and compared to those fabricated with weak links of PbTe, a similar material yet topologically trivial. Most striking is the difference in the AC Josephson effect: junctions made with Pb $_{0.5}$ Sn $_{0.5}$ Te exhibit rich subharmonic structure consistent with a skewed current-phase relation. This structure is absent in junctions fabricated from PbTe. A discussion is given on the origin of this effect as an indication of novel behavior arising from the topologically nontrivial surface state.

Keywords

josephson junctions

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@article{arxiv.1710.06077,
  title  = {Weak-link Josephson Junctions Made from Topological Crystalline Insulators},
  author = {R. A. Snyder and C. J. Trimble and C. C. Rong and P. A. Folkes and P. J. Taylor and J. R. Williams},
  journal= {arXiv preprint arXiv:1710.06077},
  year   = {2018}
}

Weak-link Josephson Junctions Made from Topological Crystalline Insulators

Abstract

Keywords

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