“…The exact transmission-energy dependence can be given for two special device geometries in graphene: a rectangular sample attached to heavily-doped graphene leads [ 19 , 20 , 21 ] and for the Corbino disk [ 22 , 23 ]. Although these systems posses peculiar symmetries, allowing one to solve the scattering problem employing analytical mode-matching method (in particular, the mode mixing does not occur), both solutions were proven to be robust against various symmetry-breaking perturbations [ 48 , 49 , 50 , 51 ]. More importantly, several features of the results have been confirmed in the experiments [ 33 , 34 , 52 , 53 ] showing that even such idealized systems provide valuable insights into the quantum transport phenomena involving Dirac fermions in graphene.…”