期刊
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
卷 75, 期 12, 页码 -出版社
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.75.124701
关键词
two-dimensional graphite; electron-phonon interaction; optical phonon; broadening
The frequency shift and broadening of long-wavelength optical phonons due to interactions with electrons are calculated in a monolayer graphene as a function of the electron density. The broadening disappears and the frequency shift exhibits a logarithmic singularity when the Fermi energy is half of the energy of the optical phonon. The shift increases in proportion to the Fermi energy for sufficiently high electron density.
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