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arXiv 1111.6333cond-mat.mes-hallcond-mat.mtrl-sci
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锗烷烯结构和电子性质的第一性原理研究

First-Principles Study of Structural and Electronic Properties of Germanene

Harihar Behera, Gautam Mukhopadhyay

摘要:

采用第一性原理计算研究了石墨烯的锗类似物锗烯的基态结构和电子性质。在结构优化方面,锗烯的类石墨烯蜂窝结构是屈曲的(屈曲参数$Δ= 0.635$ ε),而石墨烯的平面结构(屈曲参数$Δ= 0.0$ ε)是屈曲的。尽管如此,锗烯具有与石墨烯相似的电子结构。虽然证实了报道的结果,我们新预测的面内收缩的六方锗(热)沿“c”轴的拉伸,类似于在石墨中观察到的现象。

英文摘要:

The ground state structural and electronic properties of germanene (the germanium analogue of graphene) are investigated using first-principles calculations. On structure optimization, the graphene-like honeycomb structure of germanene turns out as buckled (buckling parameter $Δ= 0.635$ Å) in contrast with graphene's planar structure (buckling parameter $Δ= 0.0$ Å). In spite of this, germanene has similar electronic structure as that of graphene. While corroborating the reported results, we newly predict the in-plane contraction of hexagonal Ge with (thermal) stretching along the "c" axis, akin to a phenomenon observed in graphite.

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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