Title | Plasmon-pole approximation for many-body effects in extrinsic graphene |
Publication Type | Journal Article |
Year of Publication | 2018 |
Authors | E.. H. Hwang, R. E. Throckmorton, and S. Das Sarma |
Journal | PHYSICAL REVIEW B |
Volume | 98 |
Pagination | 195140 |
Date Published | NOV 28 |
ISSN | 2469-9950 |
Abstract | We develop the plasmon-pole approximation (PPA) theory for calculating the carrier self-energy of extrinsic graphene as a function of doping density within analytical approximations to the GW random phase approximation (GW-RPA). Our calculated self-energy shows excellent quantitative agreement with the corresponding full GW-RPA calculation results in spite of the simplicity of the PPA, establishing the general validity of the plasmon-pole approximation scheme. We also provide a comparison between the PPA and the hydrodynamic approximation in graphene, and comment on the experimental implications of our findings. |
DOI | 10.1103/PhysRevB.98.195140 |