Phonon anharmonicities in graphite and graphene
| dc.creator | Bonini, Nicola | |
| dc.creator | Lazzeri, Michele | |
| dc.creator | Marzari, Nicola | |
| dc.creator | Mauri, Francesco | |
| dc.date | 2007-08-31 | |
| dc.date | 2007-10-25 | |
| dc.date.accessioned | 2026-07-07T08:38:17Z | |
| dc.date.available | 2026-07-07T08:38:17Z | |
| dc.description | We determine from first-principles the finite-temperature properties--linewidths, line shifts, and lifetimes--of the key vibrational modes that dominate inelastic losses in graphitic materials. In graphite, the phonon linewidth of the Raman-active E2g mode is found to decrease with temperature; such anomalous behavior is driven entirely by electron-phonon interactions, and does not appear in the nearly-degenerate infrared-active E1u mode. In graphene, the phonon anharmonic lifetimes and decay channels of the A'1 mode at K dominate over E2g at G and couple strongly with acoustic phonons, highlighting how ballistic transport in carbon-based interconnects requires careful engineering of phonon decays and thermalization. | |
| dc.description | 5 pages, 4 figures; typos corrected and reference added | |
| dc.identifier | https://arxiv.org/abs/0708.4259 | |
| dc.identifier | http://arxiv.org/abs/0708.4259 | |
| dc.identifier | Phys. Rev. Lett. 99, 176802 (2007) | |
| dc.identifier | doi:10.1103/PhysRevLett.99.176802 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/140672 | |
| dc.subject | Materials Science | |
| dc.title | Phonon anharmonicities in graphite and graphene | |
| dc.type | text |