Kohn anomaly and interplay of electron-electron and electron-phonon interactions in epitaxial graphene
| dc.creator | Zhou, S. Y. | |
| dc.creator | Siegel, D. A. | |
| dc.creator | Fedorov, A. V. | |
| dc.creator | Lanzara, A. | |
| dc.date | 2008-10-22 | |
| dc.date.accessioned | 2026-07-07T10:19:23Z | |
| dc.date.available | 2026-07-07T10:19:23Z | |
| dc.description | The interplay of electron-phonon (el-ph) and electron-electron (el-el) interactions in epitaxial graphene is studied by directly probing its electronic structure. We found a strong coupling of electrons to the soft part of the A1g phonon evident by a kink at 150+/-15 meV, while the coupling of electrons to another expected phonon E2g at 195 meV can only be barely detected. The possible role of the el-el interaction to account for the enhanced coupling of electrons to the A1g phonon, and the contribution of el-ph interaction to the linear imaginary part of the self energy at high binding energy are also discussed. Our results reveal the dominant role of the A1g phonon in the el-ph interaction in graphene, and highlight the important interplay of el-el and el-ph interactions in the self energy of graphene. | |
| dc.description | accepted to Phys. Rev. B | |
| dc.identifier | https://arxiv.org/abs/0810.4159 | |
| dc.identifier | http://arxiv.org/abs/0810.4159 | |
| dc.identifier | Phys. Rev. B 78, 193404 (2008) | |
| dc.identifier | doi:10.1103/PhysRevB.78.193404 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/174487 | |
| dc.subject | Materials Science | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Kohn anomaly and interplay of electron-electron and electron-phonon interactions in epitaxial graphene | |
| dc.type | text |