Quasiparticle Transformation During a Metal-Insulator Transition in Graphene

Details Quasiparticle Transformation During a Metal-Insulator Transition in Graphene Quasiparticle Transformation During a Metal-Insulator Transition in Graphene

2009-04-15

arxiv.org/abs/0904.2249v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 4 figures

Scientific paper

Here we show, with simultaneous transport and photoemission measurements, that the graphene terminated SiC(0001) surface undergoes a metal-insulator transition (MIT) upon dosingwith small amounts of atomic hydrogen. We find the room temperature resistance increases by about 4 orders of magnitude, a transition accompanied by anomalies in the momentum-resolved spectral function including a non-Fermi Liquid behaviour and a breakdown of the quasiparticle picture. These effects are discussed in terms of a possible transition to a strongly (Anderson) localized ground state.

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