Superconductivity-induced features in the electronic Raman spectrum of monolayer graphene
A. García-Ruiz, M. Mucha-Kruczyński, V. I. Fal'ko
DOI 10.1103/PhysRevB.97.155405 · Physical Review B
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Abstract
Using the continuum model, we investigate theoretically the contribution of the low-energy electronic excitations to the Raman spectrum of superconducting monolayer graphene. We consider superconducting phases characterised by an isotropic order parameter in a single valley and find a Raman peak at a shift set by the size of the superconducting gap. The height of this peak is proportional to the square root of the gap and the third power of the Fermi level, and we estimate its quantum efficiency as I∼10−14.
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