title: Quantum size effects in the polarizability of carbon fullerenes.
abstract: We investigate the size-dependent dielectric response of carbon fullerenes with up to 3840 atoms in the framework of the linear response theory. Our results suggest a significant polarizability enhancement due to quantum size effects with respect to classical or semiclassical calculations. The accuracy of our results, based on a parametrized Hamiltonian, is verified by ab initio time dependent density functional calculations for smaller fullerenes. Our findings underline the importance of quantum effects in the electronic response of nano- and mesoscopic systems.
authors.affiliation: Departamento de Física da Universidade, P-3004-516 Coimbra, Portugal.
authors.forename: G K
authors.initials: GK
authors.lastname: Gueorguiev
authors.forename: J M
authors.initials: JM
authors.lastname: Pacheco
authors.forename: David
authors.initials: D
authors.lastname: Tománek