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arXiv 1503.00212cond-mat.mes-hall
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多层石墨烯体系中载流子相互作用的堆积效应

Stacking dependence of carrier-interactions in multilayer graphene systems

Yunsu Jang, E. H. Hwang, A. H. MacDonald, Hongki Min

摘要:

我们确定了定性的趋势,在多层石墨烯中的载流子相互作用现象的堆叠顺序的依赖。我们的理论是基于一种新的方法,明确表现出的重要作用,在相互作用现象的动量方向依赖的intersite阶段确定的堆叠顺序。利用这种方法,我们计算和比较了几种不同的少层石墨烯系统的自能,密度-密度响应函数,集体模式和基态能量。电子-电子相互作用对重要电子性质的影响可以理解为带内交换、带间交换和相关贡献之间的竞争,它们随堆叠排列而系统地变化。

英文摘要:

We identify qualitative trends in the stacking sequence dependence of carrier-carrier interaction phenomena in multilayer graphene. Our theory is based on a new approach which explicitly exhibits the important role in interaction phenomena of the momentum-direction dependent intersite phases determined by the stacking sequence. Using this method, we calculate and compare the self-energies, density--density response functions, collective modes, and ground-state energies of several different few layer graphene systems. The influence of electron--electron interactions on important electronic properties can be understood in terms of competition between intraband exchange, interband exchange and correlation contributions that vary systematically with stacking arrangement.

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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