Record number :
1206990
Title of article :
Electric-field-induced plasmon in AA-stacked bilayer graphene Original Research Article
Author/Authors :
Y.C. Chuang، نويسنده , , J.Y. Wu، نويسنده , , M.F. Lin، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
Pages :
9
From page :
298
To page :
306
Abstract :
The collective excitations in AA-stacked bilayer graphene for a perpendicular electric field are investigated analytically within the tight-binding model and the random-phase approximation. Such a field destroys the uniform probability distribution of the four sublattices. This drives a symmetry breaking between the intralayer and interlayer polarization intensities from the intrapair band excitations. A field-induced acoustic plasmon thus emerges in addition to the strongly field-tunable intrinsic acoustic and optical plasmons. At long wavelengths, the three modes show different dispersions and field dependence. The definite physical mechanism of the electrically inducible and tunable mode can be expected to also be present in other AA-stacked few-layer graphenes.
Keywords :
Plasmon , Bilayer graphene , Tight-binding model , Random-phase approximation , Electric field
Journal title :
Annals of Physics
Serial Year :
2013
Link To Document :
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