Electron-Phonon Interactions in Graphene, Bilayer Graphene, and Graphite
Electron-Phonon Interactions in Graphene, Bilayer Graphene, and Graphite
复制标题
DOI：
10.1021/nl801884n
复制
发表时间：
2008-12-01
期刊：
影响因子：
10.8
通讯作者：
Louie, Steven G.
中科院分区：
文献类型：
--
作者：
Park, Cheol-Hwan;Giustino, Feliciano;Louie, Steven G.
使用第一性原理技术，我们计算的电子费米速度和振动寿命所产生的电子-声子相互作用在掺杂的双层石墨烯和石墨中的重整化，并比较结果与相应的量在石墨烯。对于类似的掺杂水平，在双层石墨烯和石墨中的费米速度重整化被发现是大约30%大于石墨烯。在双层石墨烯的情况下，这种差异被证明是由层间相互作用引起的。我们讨论了我们的研究结果在最近的光电子能谱和拉曼光谱实验。
Using first-principles techniques, we calculate the renormalization of the electron Fermi velocity and the vibrational lifetimes arising from electron-phonon interactions in doped bilayer graphene and in graphite and compare the results with the corresponding quantities in graphene. For similar levels of doping, the Fermi velocity renormalization in bilayer graphene and in graphite is found to be approximately 30% larger than that in graphene. In the case of bilayer graphene, this difference is shown to arise from the interlayer interaction. We discuss our findings in the light of recent photoemission and Raman spectroscopy experiments.