Uniaxial strain in graphene by Raman spectroscopy:<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>G</mml:mi></mml:math>peak splitting, Grüneisen parameters, and sample orientation

Mohiuddin, Tariq; Lombardo, Antonio; R. Nair, Rahul; Bonetti, A.; Savini, G.; Jalil, R.; Bonini, Nicola; M. Basko, D.; Galiotis, Costas; Marzari, Nicola; S. Novoselov, Kostya; K. Geǐm, A.; C. Ferrari, Andrea

doi:10.1103/physrevb.79.205433

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Uniaxial strain in graphene by Raman spectroscopy:Gpeak splitting, Grüneisen parameters, and sample orientation

Published in Physical Review B • May 29, 2009

Authors:

Tariq Mohiuddin

Antonio Lombardo

Rahul R. Nair

Abstract

We uncover the constitutive relation of graphene and probe the physics of its optical phonons by studying its Raman spectrum as a function of uniaxial strain. We find that the doubly degenerate ${E}_{2g}$ optical mode splits in two components: one polarized along the strain and the other perpendicul...

Subject

Graphene

Phonon

Raman spectroscopy

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