2008/01/31 by Erik Henriksen, E. A. Henriksen, Zhigang Jiang +13 · 5 citations
Materials Science · Physics and Astronomy · #Atomic and Molecular Physics #Graphene research and applications #Quantum and electron transport phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.100.087403
published as Phys. Rev. Lett. 100, 087403 (2008) · to appear in Phys. Rev. Lett. Updated version with two added references and minor text editing
arxiv created 2008/02/23 · openalex publication_date 2008/02/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.