Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 62: [TT] Transport: Graphene 1 (jointly with MA, HL, DY, DS, O)
O 62.2: Vortrag
Donnerstag, 29. März 2012, 09:45–10:00, BH 334
Emergent Gauge Fields in Bilayer Graphene — •Roland Winkler1,2,3 and Ulrich Zülicke4 — 1University of Basque Country and IKERBASQUE Foundation, Bilbao, Spain — 2Northern Illinois University, DeKalb, Illinois 60115, USA — 3Argonne National Laboratory, Argonne, Illinois 60439, USA — 4School of Chemical and Physical Sciences and MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, Wellington 6140, New Zealand
We present a detailed study of the electronic properties of bilayer graphene. Group theory is used to derive an invariant expansion of the Hamiltonian for electron states near the K point taking into account the effect of electric and magnetic fields, strain and spin-orbit coupling. We obtain several new gauge fields for band electrons in bilayer graphene, resulting in novel orbital and spin-related effects.
RW is supported by IKERBASQUE Foundation, Bilbao, Spain. Work at Argonne was supported by DOE BES under Contract No. DE-AC02-06CH11357. UZ is supported by MacDiarmid Institute for Advanced Materials and Nanotechnology.