Ab initio calculation of the G peak intensity of graphene: Laser-energy and Fermi-energy dependence and importance of quantum interference effects

Sven Reichardt and Ludger Wirtz
Phys. Rev. B 95, 195422 – Published 22 May 2017

Abstract

We present the results of a diagrammatic, fully ab initio calculation of the G peak intensity of graphene. The flexibility and generality of our approach enables us to go beyond the previous analytical calculations in the low-energy regime. We study the laser and Fermi energy dependence of the G peak intensity and analyze the contributions from resonant and nonresonant electronic transitions. In particular, we explicitly demonstrate the importance of quantum interference and nonresonant states for the G peak process. Our method of analysis and computational concept is completely general and can easily be applied to study other materials as well.

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  • Received 24 January 2017

DOI:https://doi.org/10.1103/PhysRevB.95.195422

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Sven Reichardt1,2 and Ludger Wirtz1

  • 1Physics and Materials Science Research Unit, University of Luxembourg, 1511 Luxembourg, Luxembourg
  • 2JARA-FIT and 2nd Institute of Physics, RWTH Aachen University, 52074 Aachen, Germany

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Issue

Vol. 95, Iss. 19 — 15 May 2017

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