Playing relativistic billiards beyond graphene

Emerson Sadurni (1, 2) , Thomas H. Seligman (1, 3) , Fabrice Mortessagne (4)

1 CICC - Centro Internacional de Ciencias
2 Institut für Quantenphysik
3 Instituto de Ciencias Físicas
4 LPMC - Laboratoire de physique de la matière condensée

The possibility of using hexagonal structures in general and graphene in particular to emulate the Dirac equation is the basis of our considerations. We show that Dirac oscillators with or without restmass can be emulated by distorting a tight binding model on a hexagonal structure. In a quest to make a toy model for such relativistic equations we first show that a hexagonal lattice of attractive potential wells would be a good candidate. First we consider the corresponding one-dimensional model giving rise to a one-dimensional Dirac oscillator, and then construct explicitly the deformations needed in the two-dimensional case. Finally we discuss, how such a model can be implemented as an electromagnetic billiard using arrays of dielectric resonators between two conducting plates that ensure evanescent modes outside the resonators for transversal electric modes, and describe an appropriate experimental setup.

Mots clés: graphene; microwave cavity; relativistic Dirac equation; Dirac oscillator

Domaines: Autre [cond-mat.other]; Systèmes mésoscopiques et effet Hall quantique [cond-mat.mes-hall]

Emerson Sadurni, Thomas H. Seligman, Fabrice Mortessagne. Playing relativistic billiards beyond graphene. New Journal of Physics, 2010, 12, pp.053014. ⟨hal-00451034v2⟩