High-temperature surface superconductivity in topological flat-band systems

Details High-temperature surface superconductivity in topological flat-band systems High-temperature surface superconductivity in topological flat-band systems

2011-03-10

arxiv.org/abs/1103.2033v2

Physics

Condensed Matter

Superconductivity

Scientific paper

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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