Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 85: Graphene: Electronic Properties & Structure
(Joint session of O and TT organized by O)

TT 85.7: Vortrag

Freitag, 11. März 2016, 12:00–12:15, S051

Deformation in graphene and few layer graphenes: interlayer gauge fields and optical deformations — •Nicolas Ray¹, Fabian Rost¹, Reena Gupta², Sangeeta Sharma², Oleg Pankratov¹, and Sam Shallcross¹ — ¹Lehrstuhl für theoretische Festkörperphysik, Universität Erlangen-Nürnberg, Staudtstr. 7 B2, 91058 Erlangen, Germany — ²Max-Planck-Institute for Microstructure Physics, Weinberg 2, 06120 Halle, Germany

We present a general theory of deformations in graphene and few layer graphenes. In single layer graphene we consider both acoustic and optical deformations, and show that the latter can generate chiral gap opening fields. For the case of few layer graphenes we derive a general interlayer gauge term that relates the local stacking vector to an off-diagonal non-Abelian field. We show that this general result reduces to well known cases such as the Bernal or twist graphene bilayer, but can also be used to treat more complex situations such as partial dislocations in bilayer graphene.