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arXiv 1408.6641cond-mat.mes-hallcond-mat.mtrl-sci
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磷烯体系结构分析和晶格振动的群论

Group theory for structural analysis and lattice vibrations in phosphorene systems

J. Ribeiro-Soares, R. M. Almeida, L. G. Cançado, M. S. Dresselhaus, A. Jorio

摘要:

对与磷烯相关的二维元素体系进行群论分析,包括(i)石墨烯、硅烯、锗烯和锡烯,(ii)对层数的依赖性,(iii)两种堆积排列.从最对称的$D_{6h}^{1}$石墨烯空间群出发,发现结构具有群-子群关系,并且分析其晶格振动的不可约表示使得可以区分不同的同素异形体。该分析可用于研究应变的影响,理解结构相变,表征层数,晶体学取向和非线性现象。

英文摘要:

Group theory analysis for two-dimensional elemental systems related to phosphorene is presented, including (i) graphene, silicene, germanene and stanene, (ii) dependence on the number of layers and (iii) two stacking arrangements. Departing from the most symmetric $D_{6h}^{1}$ graphene space group, the structures are found to have a group-subgroup relation, and analysis of the irreducible representations of their lattice vibrations makes it possible to distinguish between the different allotropes. The analysis can be used to study the effect of strain, to understand structural phase transitions, to characterize the number of layers, crystallographic orientation and nonlinear phenomena.

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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