Superconducting States in Pseudo-Landau-Levels of Strained Graphene

Bruno Uchoa; Yafis Barlas

doi:10.1103/PhysRevLett.111.046604

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Superconducting States in Pseudo-Landau-Levels of Strained Graphene

Bruno Uchoa, Yafis Barlas

DOI 10.1103/PhysRevLett.111.046604 · Physical Review Letters

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Abstract

We describe the formation of superconducting states in graphene in the presence of pseudo-Landau-levels induced by strain, when time reversal symmetry is preserved. We show that superconductivity in strained graphene is quantum critical when the pseudo-Landau-levels are completely filled, whereas at partial fillings superconductivity survives at weak coupling. In the weak coupling limit, the critical temperature scales linearly with the coupling strength and shows a sequence of quantum critical points as a function of the filling factor that can be accessed experimentally. We argue that superconductivity can be induced by electron-phonon coupling and that the transition temperature can be controlled with the amount of strain and with the filling fraction of the Landau levels.