Flat-band superconductivity in strained Dirac materials

V. J. Kauppila, F. Aikebaier, T. T. Heikkilä

Research output: Contribution to journalArticleScientificpeer-review

47 Citations (Scopus)

Abstract

We consider superconducting properties of a two-dimensional Dirac material such as graphene under strain that produces a flat-band spectrum in the normal state. We show that in the superconducting state, such a model results in a highly increased critical temperature compared to the case without the strain, inhomogeneous order parameter with two-peak shaped local density of states and yet a large and almost uniform and isotropic supercurrent. This model could be realized in strained graphene or ultracold atom systems and could be responsible for unusually strong superconductivity observed in some graphite interfaces and certain IV-VI semiconductor heterostructures.

Original languageEnglish
Article number214505
Number of pages5
JournalPhysical Review B
Volume93
Issue number21
DOIs
Publication statusPublished - 13 Jun 2016
MoE publication typeA1 Journal article-refereed

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