High-temperature surface superconductivity in topological flat-band systems

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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.

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Original languageEnglish
Article number220503
Pages (from-to)1-4
JournalPhysical Review B
Volume83
Issue number22
Publication statusPublished - 2011
MoE publication typeA1 Journal article-refereed

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