Creating better superconductors by periodic nanopatterning

Abstract

The quest to create superconductors with higher transition temperatures is as old as superconductivity itself. One strategy, popular after the realization that (conventional) superconductivity is mediated by phonons, is to chemically combine different elements within the crystalline unit cell to maximize the electron-phonon coupling. This led to the discovery of NbTi and Nb3Sn, to name just the most technologically relevant examples. Here, we propose a radically different approach to transform a `pristine' material into a better (meta-) superconductor by making use of modern fabrication techniques: designing and engineering the electronic properties of thin films via periodic patterning on the nanoscale. We present a model calculation to explore the key effects of different supercells that could be fabricated using nanofabrication or deliberate lattice mismatch, and demonstrate that specific pattern will enhance the coupling and the transition temperature. We also discuss how numerical methods could predict the correct design parameters to improve superconductivity in materials including Al, NbTi, and MgB2

References in corpus (3)

• A kilobyte rewritable atomic memory
• Theoretical modeling of critical temperature increase in metamaterial superconductors
• Optimal Boson energy for superconductivity in the Holstein model

Cited by in corpus (5)

• Engineered electronic states in atomically precise artificial lattices and graphene nanoribbons
• Measuring local moiré lattice heterogeneity of twisted bilayer graphene
• Metamaterial Superconductors
• Flat bands with fragile topology through superlattice engineering on single-layer graphene
• Hybrid acousto-electromagnetic metamaterial superconductors