Splitting of the Raman $2D$ band of graphene subjected to strain

Details Splitting of the Raman $2D$ band of graphene subjected to strain Splitting of the Raman $2D$ band of graphene subjected to strain

2010-08-09

arxiv.org/abs/1008.1488v2

Phys. Rev. B 82, 201409(R) (2010)

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevB.82.201409

The Raman $2D$-band -important for the analysis of graphene- shows a splitting for uniaxial strain. The splitting depends on the strength and direction of the applied strain and on the polarization of the incident and outgoing light. We expand the double-resonance Raman model in order to explain the strain direction dependence and the polarization dependence of the splitting. The analysis of this splitting gives new insight into the origin of the $2D$-band. Our prediction of the strain direction and polarization dependence agrees well with recent experiments.

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