RSS icon
Twitter icon
Facebook icon
Vimeo icon
YouTube icon

Plasmon-pole approximation for many-body effects in extrinsic graphene

TitlePlasmon-pole approximation for many-body effects in extrinsic graphene
Publication TypeJournal Article
Year of Publication2018
AuthorsE.. H. Hwang, R. E. Throckmorton, and S. Das Sarma
JournalPHYSICAL REVIEW B
Volume98
Pagination195140
Date PublishedNOV 28
ISSN2469-9950
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.

DOI10.1103/PhysRevB.98.195140