2007/02/27 by Srijan Kumar Saha, U. V. Waghmare, Saha, Srijan Kumar +6
Engineering · Physics and Astronomy · #Mechanical and Optical Resonators #Photonic and Optical Devices #Spectroscopy and Quantum Chemical Studies #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.cond-mat/0702627
4 pages, 3 figures, 1 table
arxiv created 2007/03/15 · arxiv updated 2009/12/01
We use first-principles density-functional calculations to determine the frequency shift of the A'1-\bf K phonon (Raman D band) in monolayer graphene, as a function of the charge doping. A detailed DFT study on the electron-phonon coupling and the phonon line width of E2g-\bm Γ and A'1-\bf K phonons are also performed for graphene multi-layers. Furthermore, we explain the experimentally observed '1/(Number of Layers)' behaviour of the Raman G band position after including the dynamic response treated within time dependent perturbation theory.