Screening Effect and Impurity Scattering in Monolayer Graphene | Zendy

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Screening Effect and Impurity Scattering in Monolayer Graphene

Author(s) -

Tsuneya Ando

Publication year - 2006

Publication title -

journal of the physical society of japan

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.76

H-Index - 139

eISSN - 1347-4073

pISSN - 0031-9015

DOI - 10.1143/jpsj.75.074716

Subject(s) - impurity , graphene , scattering , materials science , condensed matter physics , conductivity , fermi energy , electron , monolayer , electrical resistivity and conductivity , polarization (electrochemistry) , fermi level , kubo formula , physics , optics , nanotechnology , chemistry , quantum mechanics

The static polarization function is calculated in two-dimensional graphite and used for the calculation of the conductivity limited by charged-impurity scattering. The conductivity increases in proportion to the electron concentration and the mobility remains independent of the Fermi energy, in qualitative agreement with experiments. The screening increases in proportion to temperature at sufficiently high temperatures in contrast to the behavior in conventional two- dimensional systems, leading to the mobility increase proportional to the square of temperature.

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