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arXiv 0905.3718cond-mat.mtrl-sci
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石墨烯和碳纳米管中声子的价力模型

Valence Force Model for Phonons in Graphene and Carbon Nanotubes

Vasili Perebeinos, J. Tersoff

摘要:

许多计算需要一个简单的经典模型来描述sp^2键碳原子之间的相互作用,比如石墨烯或碳纳米管。在这里,我们提出了一个新的价力模型来描述这些相互作用。计算得到的石墨烯的声子谱和纳米管的呼吸模式能量与实验测量和从头计算结果吻合得很好。该模型不假设底层晶格,因此它也可以直接应用于扭曲的结构。讨论了该模型的特点和局限性。

英文摘要:

Many calculations require a simple classical model for the interactions between sp^2-bonded carbon atoms, as in graphene or carbon nanotubes. Here we present a new valence force model to describe these interactions. The calculated phonon spectrum of graphene and the nanotube breathing-mode energy agree well with experimental measurements and with ab initio calculations. The model does not assume an underlying lattice, so it can also be directly applied to distorted structures. The characteristics and limitations of the model are discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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