We show that Coulomb coupled bilayers of the type which can be fabricated in GaAs systems can have a ‘‘conventional’’ BCS superconducting instability at reasonable temperatures, i.e., 0.1 K<${\mathit{T}}_{\mathit{c}}$≲1 K.

• Received 16 June 1995

DOI:https://doi.org/10.1103/PhysRevB.52.10327