Two-Dimensional Analysis of the Double-Resonant 2D Raman Mode in Bilayer Graphene

Herziger F, Calandra M, Gava P, May P, Lazzeri M, Mauri F, Maultzsch J (2014)

Publication Status: Published

Publication Type: Journal article

Publication year: 2014

Journal

Physical Review Letters American Physical Society

Publisher: AMER PHYSICAL SOC

Book Volume: 113

Journal Issue: 18

DOI: 10.1103/PhysRevLett.113.187401

Abstract

By computing the double-resonant Raman scattering cross section completely from first principles and including the electron-electron interaction at the GW level, we unravel the dominant contributions for the double-resonant 2D mode in bilayer graphene. We show that, in contrast to previous works, the so-called inner processes are dominant and that the 2D-mode line shape is described by three dominant resonances around the K point. We show that the splitting of the transversal optical (TO) phonon branch in the Gamma-K direction, as large as 12 cm(-1) in the GW approximation, is of great importance for a thorough description of the 2D-mode line shape. Finally, we present a method to extract the TO phonon splitting and the splitting of the electronic bands from experimental data.

Authors with CRIS profile

Janina Maultzsch Lehrstuhl für Experimentalphysik

Involved external institutions

Technische Universität Berlin DE Germany (DE) University of Paris 6 - Pierre et Marie Curie / Université Paris VI Pierre et Marie Curie (UPMC) FR France (FR)

How to cite

APA:

Herziger, F., Calandra, M., Gava, P., May, P., Lazzeri, M., Mauri, F., & Maultzsch, J. (2014). Two-Dimensional Analysis of the Double-Resonant 2D Raman Mode in Bilayer Graphene. Physical Review Letters, 113(18). https://dx.doi.org/10.1103/PhysRevLett.113.187401

MLA:

Herziger, Felix, et al. "Two-Dimensional Analysis of the Double-Resonant 2D Raman Mode in Bilayer Graphene." Physical Review Letters 113.18 (2014).

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