High-temperature surface superconductivity in topological flat-band systems

被引：405
|
作者：
Kopnin, N. B. [1 ,2 ]
Heikkila, T. T. [1 ]
Volovik, G. E. [1 ,2 ]
机构：
[1] Aalto Univ, Low Temp Lab, FIN-00076 Aalto, Finland
[2] LD Landau Theoret Phys Inst, RU-117940 Moscow, Russia
来源：
PHYSICAL REVIEW B | 2011年 / 83卷 / 22期
基金：
芬兰科学院; 欧洲研究理事会; 俄罗斯基础研究基金会;
关键词：
ELECTRONIC-PROPERTIES; GRAPHENE; CORE;
D O I：
10.1103/PhysRevB.83.220503
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
引用
收藏
页数：4
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