We study the dependence of the plasmon dispersion relation of graphene on applied uniaxial strain. Besides electron correlation at the random-phase approximation level, we also include local field effects specific for the honeycomb lattice. As a consequence of the two-band character of the electronic band structure, we find two distinct plasmon branches. We recover the square-root behavior of the low-energy branch, and find a nonmonotonic dependence of the strain-induced modification of its stiffness, as a function of the wave-vector orientation with respect to applied strain.
Titolo: | Dynamical polarization of graphene under strain | |
Autori interni: | ||
Data di pubblicazione: | 2010 | |
Rivista: | ||
Handle: | http://hdl.handle.net/20.500.11769/31971 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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