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HL: Fachverband Halbleiterphysik
HL 84: Graphene: Theory (HL, jointly with O, TT)
HL 84.9: Vortrag
Donnerstag, 14. März 2013, 17:15–17:30, H17
Electronic reflection for a single layer graphene quantum well — •Abir Mhamdi1,2, Emna Ben Salem1, and Sihem Jaziri3 — 1Laboratoire de Physique de la Matière Condensée, Faculté des Sciences de Tunis, Tunisia — 2Institut für Theoretische Physik, Georg-August Universität Göttingen, Germany — 3Laboratoire de Physique des Matériaux, Faculté des Sciences de Bizerte, Tunisia
We address the problem of Dirac fermions’ graphene quantum well (GQW) and we focus on the low energy approximation for the Hamiltonian of the system where the former can be described by a Dirac-like Hamiltonian. Interesting relations are obtained and used to discuss the influence of the spin-orbit coupling, which induces an effective mass-like term, on the transport properties of single-layer graphene quantum well. It is found that the reflection probability of incident electrons is sensitive to the effective mass-like term. This can be explained by the dependence of reflection coefficient R on the incident electrons’ direction and their energies. Notably, we found that the reflection probability for massive fermions with a very small angle, i.e. the wave-vector along the transport direction is zero in the GQW, can be greatly suppressed.