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Morozov, Sergey; Müller, David (2018): Lieb–Thirring and Cwickel–Lieb–Rozenblum inequalities for perturbed graphene with a Coulomb impurity. In: Journal of Spectral Theory, Vol. 8, No. 3: pp. 987-1017
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Abstract

We study the two dimensional massless Coulomb–Dirac operator restricted to its positive spectral subspace and prove estimates on the negative eigenvalues created by electromagnetic perturbations.