Low Temperature Physics: 34, 818 (2008); https://doi.org/10.1063/1.2981395 (8 pages)
Физика Низких Температур: Том 34, Выпуск 10 (Октябрь 2008), c. 1040-1048    ( к оглавлению , назад )

Spectral function of graphene with short-range impurity centers

Yu.V. Skrypnyk

G.V. Kurdyumov Institute of Metal Physics of the National Academy of Sciences of Ukraine 36 Vernadsky Ave., Kyiv 03680, Ukraine

V.M. Loktev

Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine 14-b Metrolohichna Str., Kyiv 03680, Ukraine
E-mail: vloktev@bitp.kiev.ua

Received May 20, 2008


Spectral function of graphene with point substitutional defects is calculated for different impurity concentrations. It is demonstrated that features in the spectral function of graphene observed in ARPES experiments can be caused by the presence of a well-defined resonance state and are clearly pronounced at the impurity concentrations, which are of the order of the critical concentration for the impurity induced spectrum rearrangement.

PACS: 71.23.–k Electronic structure of disordered solids;
PACS: 71.55.–i Impurity and defect levels;
PACS: 81.05.Uw Carbon, diamond, graphite.

Key words: spectral function of graphene, ARPES experiments, spectrum rearrangement.