The magneto-optical absorption properties of graphene multilayers are theoretically studied. It is shown that the spectrum can be decomposed into sub-components effectively identical to the monolayer or bilayer graphene, allowing us to understand the spectrum systematically as a function of the layer number. Oddlayered graphenes always exhibit absorption peaks which shifts in proportion to B, w...

We study both monolayer and bilayer graphene transport properties taking into account the presence of correlations in the spatial distribution of charged impurities. In particular we find that the experimentally observed sublinear scaling of the graphene conductivity can be naturally explained as arising from impurity correlation effects in the Coulomb disorder, with no need to assume the prese...

We report an optical study of charge transport in graphene. Diffusion of hot carriers in epitaxial graphene and reduced graphene-oxide samples are studied using an ultrafast pump-probe technique with a high spatial resolution. Spatiotemporal dynamics of hot carriers after a pointlike excitation are monitored. Carrier-diffusion coefficients of 11 000 and 5500 cm2 s−1 are measured in epitaxial gr...

We predict the existence of transverse electric (TE) plasmons in bilayer graphene. We find that their plasmonic properties are much more pronounced in bilayer than in monolayer graphene, in a sense that they can get more localized at frequencies just below ~ω = 0.4 eV for adequate doping values. This is a consequence of the perfectly nested bands in bilayer graphene which are separated by ∼ 0.4...

Anastasia Varlet,1, ∗ Ming-Hao Liu (劉明豪),2 Dominik Bischoff,1 Pauline Simonet,1 Takashi Taniguchi,3 Kenji Watanabe,3 Klaus Richter,2 Thomas Ihn,1 and Klaus Ensslin1 1Solid State Physics Laboratory, ETH Zürich, 8093 Zürich, Switzerland 2Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany 3Advanced Materials Laboratory, National Institute for Materials Science, 1...

• We review recent progress in the computational study of graphene as an RO

Our measurement results have shown that bilayer graphene exhibits an unexpected sharp transition of the resistance value in the temperature region 200~250 K. We argue that this behavior originates from the interlayer ripple scattering effect between the top and bottom ripple graphene layer. The inter-scattering can mimic the Coulomb scattering but is strongly dependent on temperature. The obser...