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 Quasiparticle Transformation During a Metal-Insulator Transition in Graphene


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Here we show, with simultaneous transport and photoemission measurements, that the graphene terminated SiC0001 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.



Autor: Aaron Bostwick; Jessica L. McChesney; Konstantin Emtsev; Thomas Seyller; Karsten Horn; Stephan D. Kevan; Eli Rotenberg

Fuente: https://archive.org/







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