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TT: Fachverband Tiefe Temperaturen

TT 39: Transport: Graphene 1 (jointly with MA, HL, DY, DS, O)

TT 39.2: Vortrag

Donnerstag, 29. März 2012, 09:45–10:00, BH 334

Emergent Gauge Fields in Bilayer Graphene — •Roland Winkler^1,2,3 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.