Induced superconductivity in high mobility two dimensional electron gas in GaAs heterostructures

Understand

Introduction of a Josephson field effect transistor (JoFET) concept sparked active research on proximity effects in semiconductors.

• Induced superconductivity and electrostatic control of critical current has been demonstrated in two-dimensional gases in InAs, graphene and topological insulators, and in one-dimensional systems including quantum spin Hall edges.
• Recently, interest in superconductor-semiconductor interfaces was renewed by the search for Majorana fermions, which were predicted to reside at the interface.
• More exotic non-Abelian excitations, such as parafermions (fractional Majorana fermions) or Fibonacci fermions may be formed when fractional quantum Hall edge states interface with superconductivity.