Interference-induced surface superconductivity:Enhancement by tuning the Debye energy

Abstract

In the usual perception, surface superconductivity is associated with the surface nucleation of a superconducting condensate above the upper critical field in type-II superconductors or with a rearrangement of phonon properties and the electron-phonon coupling near surfaces/interfaces. Recently, it has been found that there is another example when the surface superconducting temperature is increased up to 20-25% as compared to the bulk one due to constructive interference of superconducting pair states. In the present work, we demonstrate that in fact, such an interferenceinduced enhancement can be much more pronounced, up to nearly 70%. Furthermore, here it is shown that such an interference enhancement persists over a wide range of microscopic parameters.

References in corpus (7)

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• Vortex Charging Effect in a Chiral $p_x\pm i{p}_y$-Wave Superconductor
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Cited by in corpus (8)

• Surface superconductor-insulator transition induced by an electric field
• Surface superconductor-insulator transition: Reduction of the critical electric field by Hartree-Fock potential
• Tailoring of the interference-induced surface superconductivity by an applied electric field
• Emergence of Surface Superconductivity through Interference in Superconducting-proximity Topological Insulators
• Superconducting properties of Fibonacci chains with enhanced superconducting pairing at the boundaries
• Yu-Shiba-Rusinov states in the s-wave superconducting kagome Hubbard model: Self-consistent Bogoliubov-de Gennes calculations
• Universal crossover in surface superconductivity: Impact of varying Debye energy
• Superconducting order parameter in aperiodic binary systems