Elevated critical temperature at BCS superconductor-band insulator interfaces

Abstract

We consider the interface between a Bardeen-Cooper-Schrieffer superconductor and non-superconducting band insulator. We show that under certain conditions, such interfaces can have an elevated superconducting critical temperature, without increasing the strength of the pairing interaction at the interface. We identify the regimes where the interface critical temperature exceeds the critical temperature associated with a superconductor-vacuum interface.

arXiv commentVersion published in Physical Review B. Two-dimensional solutions added

References in corpus (7)

• Tunneling and Magnetic Characteristics of Superconducting ZrB${}_{12}$ Single Crystals
• Boundary states with elevated critical temperatures in Bardeen-Cooper-Schrieffer superconductors
• On the Origin of the Double Superconducting Transition in Overdoped YBa2Cu3Ox
• Anomalous electron-phonon coupling probed on the surface of ZrB${}_{12}$ superconductor
• Microscopic derivation of superconductor-insulator boundary conditions for Ginzburg-Landau theory revisited. Enhanced superconductivity at boundaries with and without magnetic field
• Pair-density-wave superconductivity of faces, edges and vertices in systems with imbalanced fermions
• Stiffnessometer, a magnetic-field-free superconducting stiffness meter and its application

Cited by in corpus (1)

• Boundary Superconductivity in the BCS Model