Electronic structures and optical absorption of multilayer graphenes
Electronic structures and optical absorption of multilayer graphenes
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DOI：
10.1016/j.ssc.2009.02.052
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发表时间：
2009-07-01
影响因子：
2.1
通讯作者：
Ando, Tsuneya
中科院分区：
文献类型：
--
作者：
Koshino, Mikito;Ando, Tsuneya
我们研究了有效质量近似下多层石墨烯的电子结构和光学吸收光谱。我们将任意厚度的石墨烯的哈密顿量分解为与单层或双层石墨烯实际上相同的更小的子系统，并将光谱表示为子系统的总和。我们包括组成块状石墨的全能带参数，并仔细研究它们对能带结构的影响。我们发现破坏电子空穴对称性的特定能带参数可以通过吸收边的移动影响光谱。 (C) 2009 Elsevier Ltd. 保留所有权利。
We study the electronic structures and the optical absorption spectra of the multilayer graphenes in the effective mass approximation. We decompose the Hamiltonian of graphene with an arbitrary thickness into smaller subsystems effectively identical to monolayer or bilayer graphene, and express the optical spectrum as a summation over the subsystems. We include the full band parameters which compose the bulk graphite, and closely study their effects on the band structure. We found that the particular band parameters destroying the electron-hole symmetry can affect the optical spectrum through shift of the absorption edge. (C) 2009 Elsevier Ltd. All rights reserved.