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.
Dynamical polarization of graphene under strain / Pellegrino, F. M. D.; Angilella, G. G. N.; Pucci, R. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 82:11(2010), pp. 115434-1-115434-9.
Titolo: | Dynamical polarization of graphene under strain |
Autori interni: | |
Data di pubblicazione: | 2010 |
Rivista: | |
Citazione: | Dynamical polarization of graphene under strain / Pellegrino, F. M. D.; Angilella, G. G. N.; Pucci, R. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 82:11(2010), pp. 115434-1-115434-9. |
Handle: | http://hdl.handle.net/20.500.11769/31971 |
Appare nelle tipologie: | 1.1 Articolo in rivista |