Frequency shift of optical phonons in doped graphene layers
| dc.creator | Saha, Srijan Kumar | |
| dc.creator | Waghmare, U. V. | |
| dc.creator | Krishnamurthy, H. R. | |
| dc.creator | Sood, A. K. | |
| dc.date | 2007-02-27 | |
| dc.date | 2007-03-15 | |
| dc.date.accessioned | 2026-07-07T07:51:48Z | |
| dc.date.available | 2026-07-07T07:51:48Z | |
| dc.description | 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 E$_{2g}$-${\bm Γ}$ 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. | |
| dc.description | 4 pages, 3 figures, 1 table | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0702627 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0702627 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/125652 | |
| dc.subject | Materials Science | |
| dc.title | Frequency shift of optical phonons in doped graphene layers | |
| dc.type | text |