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arXiv 1111.2676cond-mat.mes-hall
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石墨中电子-空穴不对称性的起源

The origin of electron-hole asymmetry in graphite

P. Plochocka, P. Y. Solane, R. J. Nicholas, J. M. Schneider, B. A. Piot, D. K. Maude, O. Portugall, G. L. J. A. Rikken

摘要:

用磁光吸收测量方法测量了天然石墨中的电子空穴不对称性。在石墨的布里渊区的$K$点和$H$点处的跃迁都观察到分裂,在那里三角翘曲的影响消失。这一结果与考虑自由电子动能项的SWM哈密顿量完全一致。在石墨烯中应该存在相同的电子-空穴不对称性。

英文摘要:

The electron hole asymmetry has been measured in natural graphite using magneto-optical absorption measurements. A splitting is observed for the transitions at both the $K$-point and the $H$-point of the Brillouin zone of graphite where the effect of trigonal warping vanishes. This result is fully consistent with the SWM Hamiltonian providing the free electron kinetic energy terms are taken into account. An identical electron-hole asymmetry should be present in graphene.

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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