VENDREDI 5 JUIN 2009
11 heures (Attention: jour et horaire inhabituels!)
Salle Séminaire 5
Centre de Physique Théorique
Marseille-Luminy

Thomas Garm Pedersen
Dept. of Physics and Nanotechnology
Aalborg University, DK-9220 Aalborg Øst, Denmark

Title: Properties of gapped graphene

Abstract: Graphene is the ultimate two-dimensional material and the
properties of this extraordinary material have been explored in great
detail. The vanishing band gap, however, severely restricts
application in electronic and optoelectronic devices. For this reason,
several ways of inducing a band gap in the energy spectrum have been
suggested. In this talk, theoretical results for the electronic and
optical properties of "gapped" graphene will be discussed. Atomistic
simulations [1-3] will be compared to a simple picture of electrons in
graphene described as massive Dirac particles living in 2D. Emphasis
will be on single-particle and excitonic optical properties.

1. T. Garm Pedersen, C. Flindt, J. Pedersen, A-P. Jauho, N.A.
Mortensen and K. Pedersen "Graphene antidot lattices - designed
defects and spin qubits", Phys. Rev. Lett. 100, 136804 (2008).

2. T. Garm Pedersen, C. Flindt, J. Pedersen, A-P. Jauho, N.A.
Mortensen and K. Pedersen "Optical properties of graphene antidot
lattices", Phys. Rev. B. 77, 245431 (2008).

3. T. Garm Pedersen, A-P. Jauho, and K. Pedersen "Optical response and
excitons in gapped graphene", Phys. Rev. B. 79, 113406 (2009).