Anomaly of optical phonon in monolayer graphene
Anomaly of optical phonon in monolayer graphene
复制标题
DOI：
10.1143/jpsj.75.124701
复制
发表时间：
2006-12-01
影响因子：
1.7
通讯作者：
Ando, Tsuneya
中科院分区：
文献类型：
--
作者：
Ando, Tsuneya
在单层石墨烯中，计算了由于与电子相互作用而导致的长波光学声子的频移和展宽作为电子密度的函数。当费米能量为光学声子能量的一半时，展宽消失，频移呈现对数奇点。当电子密度足够高时，这种位移与费米能量成正比。
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.