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Dynamic properties of graphene

机译:石墨烯的动态特性

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摘要

The phonon spectrum of graphene has been studied with the minimum set of the nearest neighbors in the Born-von Kármán model taking into account the electron-electron and electron-phonon interactions. The widths, both natural and owing to interactions with defects, of phonons have been estimated. Symmetry constraints imposed on force constants are taken into account. For symmetry reasons, vibrations with the polarization normal to the plane of the layer are not related to in-plane vibrations. The phonon frequencies at symmetry points and elastic moduli are expressed in terms of force constants.
机译:研究了石墨烯的声子谱,并在Born-vonKármán模型中使用了最邻近的最小集合,并考虑了电子-电子和电子-声子的相互作用。已经估计了声子的自然宽度和由于与缺陷相互作用而产生的宽度。考虑到施加在力常数上的对称约束。出于对称性原因,极化垂直于层平面的振动与平面内振动无关。对称点的声子频率和弹性模量用力常数表示。

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