期刊
PHYSICAL REVIEW LETTERS
卷 103, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.103.186803
关键词
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资金
- EC [MTKD-CT-2005-029671, EuromagNetII, PICS-4340, ANR-08-JCJC-0034-01, ANR-06-NANO-019]
- EU [221515]
- Cariplo Foundation
- MICINN
- JCYL [SA052A07]
- Agence Nationale de la Recherche (ANR) [ANR-08-JCJC-0034] Funding Source: Agence Nationale de la Recherche (ANR)
Magneto-Raman scattering study of the E-2g optical phonons in multilayer epitaxial graphene grown on a carbon face of SiC is presented. At 4.2 K in magnetic field up to 33 T, we observe a series of well-pronounced avoided crossings each time the optically active inter-Landau level transition is tuned in resonance with the E-2g phonon excitation (at 196 meV). The width of the phonon Raman scattering response also shows pronounced variations and is enhanced in conditions of resonance. The experimental results are well reproduced by a model that gives directly the strength of the electron-phonon interaction.
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