Josephson Junctions Using Weak-Links of Topological Crystalline Insulators

Topological Crystalline Insulators (TCI) produce topological states of matter that rely on crystalline symmetry, opening new avenues to create and control the novel properties of the surface state. In this talk I will elucidate the properties of Josephson junctions that use SnTe -- a candidate TCI material -- as the weak link. Deviations from conventional junction properties are observed, including signatures of broken time reversal symmetry. The genesis of these effects, which arise from a confluence of multiple electronic bands, ferroelectric distortions and topology, will be detailed.