Data di Pubblicazione:
2013
Citazione:
Universal conductivity of graphene in the ultra-relativistic regime / I. Herbut, V. Mastropietro. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 87:20(2013 May 31), pp. 205445.1-205445.5. [10.1103/PhysRevB.87.205445]
Abstract:
We calculate the optical (cutoff >> frequency >> temperature) conductivity in clean graphene in the ultimate low-energy regime, when retardation effects of the electromagnetic interaction become important and when the full Lorentz symmetry emerges. In contrast to what happens with the short range or with the Coulomb long-range instantaneous interactions, the optical conductivity is now no longer equal to its non interacting value, but acquires universal corrections in powers of the fine structure constant. The coefficient of the first order correction is computed, and found to be of order one. We also present the result for the conductivity in the large-N limit, with N as the number of Dirac fermions species, to the order 1/N 2 .
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
I. Herbut, V. Mastropietro
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