High-temperature surface superconductivity in topological flat-band systems

2011/03/31 by N. B. Kopnin, Tero T. Heikkilä, T. T. Heikkilä +1 · 523 citations
Materials Science · Mathematics · Physics and Astronomy · #Condensed matter physics #Diamond and Carbon-based Materials Research #Geometry #Graphene #Graphene research and applications #Mathematics #Pairing #Physics #Quantum mechanics #Stacking #Superconductivity #Surface (topology) #Surface states #Topological Materials and Phenomena #Topology (electrical circuits) #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.83.220503

published in Physical Review B 83(22) (American Physical Society)

arxiv created 2011/05/04 · openalex publication_date 2011/06/08 · arxiv updated 2015/05/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We show that the topologically protected flat band emerging on a surface of a nodal fermionic system promotes the surface superconductivity due to an infinitely large density of states associated with the flat band. The critical temperature depends linearly on the pairing interaction and can be thus considerably higher than the exponentially small bulk critical temperature. We discuss an example of surface superconductivity in multilayered graphene with rhombohedral stacking.

Citations

• Scaling behavior of heavy fermion metals
• The electronic properties of graphene

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