Cyclotron resonance in bilayer graphene

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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 \sqrt{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.
to appear in Phys. Rev. Lett. Updated version with two added references and minor text editing

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Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/161303

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0801.1861
 http://arxiv.org/abs/0801.1861
 Phys. Rev. Lett. 100, 087403 (2008)
 doi:10.1103/PhysRevLett.100.087403

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