Session W29: Focus Session: Graphene V
2:30 PM–5:30 PM, Thursday, March 8, 2007
Colorado Convention Center Room: 303
Sponsoring Unit:
DMP
Chair: Kirill Bolotin, Columbia University
Abstract ID: BAPS.2007.MAR.W29.11
Abstract: W29.00011 : Moire patterns in graphene bilayers: electronic structure
4:30 PM–4:42 PM
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Abstract 
Authors:
Joao Lopes dos Santos
(CFP, Dep Fisica, Faculdade Ciencias, Universidade do Porto)
Nuno Peres
(Departamento Fisica, Universidade do Minho)
Antonio Castro Neto
(Department of Physics, Boston University)
Eduardo Castro
(CFP, Dep. Fisica, Faculdade Ciencias, Universidade do Porto)
Moire patterns, resulting from a small angle rotation of the top layer have been observed in graphite [1]. We consider a similar situation in a graphene bilayer. We determine the angles for which the resulting structure is periodic and study its symmetries. We develop a general formalism for the calculation of the electronic properties at low energies (close to the Dirac points of the uncoupled bilayers) and for small rotation angles, based on a continuum approximation for the uncoupled layers. We discuss the resulting electronic structure and possible consequences for transport properties. [1] Z. Rong and P Kuiper, Phys. Rev B. 48, 17427, (1993)
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2007.MAR.W29.11