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SUMMARY:Electrons in bilayer graphene - Dr Edward McCann\, Lancaster Unive
 rsity
DTSTART:20071018T131500Z
DTEND:20071018T141500Z
UID:TALK7989@talks.cam.ac.uk
CONTACT:Dr Jonathan Keeling
DESCRIPTION:Electrons in bilayer graphene possess an unusual property: the
 y are chiral quasiparticles characterized by Berry phase 2p. I will review
  the tight-binding model of bilayer graphene which determines the band str
 ucture and low-energy quasiparticle properties of this material. Its high-
 magnetic-field Landau level spectrum consists of almost equidistant groups
  of four-fold degenerate states at finite energy and eight zero-energy sta
 tes. This can be translated into the Hall conductivity dependence on carri
 er density which exhibits plateaus at integer values of 4e2/h and has a 
 “double” 8e2/h step between the hole and electron gases across zero de
 nsity.\n
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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