Doped graphene as tunable electron-phonon coupling material

Details Doped graphene as tunable electron-phonon coupling material Doped graphene as tunable electron-phonon coupling material

2010-03-04

arxiv.org/abs/1003.0995v2

Nano Letters, 10(2) 1172 (2010)

Physics

Condensed Matter

Materials Science

accepted for publication in NanoLetters (DOI: 10.1021/nl9034626)

Scientific paper

10.1021/nl9034626

We present a new way to tune the electron-phonon coupling (EPC) in graphene by changing the deformation potential with electron/hole doping. We show the EPC for highest optical branch at the high symmetry point K, acquires a strong dependency on the doping level due to electron-electron correlation not accounted in mean-field approaches. Such a dependency influences the dispersion (with respect to the laser energy) of the Raman D and 2D lines and the splitting of the 2D peak in multi-layer graphene. Finally this doping dependence opens the possibility to construct tunable electronic devices through the external control of the EPC.

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