title: Cyclotron resonance in bilayer graphene.
abstract: We present the first measurements of cyclotron resonance of electrons and holes in bilayer graphene. In magnetic fields up to B=18 T, we observe four distinct intraband transitions in both the conduction and valence bands. The transition energies are roughly linear in B between the lowest Landau levels, whereas they follow square root[B] for the higher transitions. This highly unusual behavior represents a change from a parabolic to a linear energy dispersion. The density of states derived from our data generally agrees with the existing lowest order tight binding calculation for bilayer graphene. However, in comparing data to theory, a single set of fitting parameters fails to describe the experimental results.
authors: Department of Physics, Columbia University, New York, New York 10027, USA. erik@phys.columbia.edu
authors: E A
authors: EA
authors: Henriksen
authors: Z
authors: Z
authors: Jiang
authors: L-C
authors: LC
authors: Tung
authors: M E
authors: ME
authors: Schwartz
authors: M
authors: M
authors: Takita
authors: Y-J
authors: YJ
authors: Wang
authors: P
authors: P
authors: Kim
authors: H L
authors: HL
authors: Stormer