Anomalous absorption line in the magneto-optical response of graphene.
Anomalous absorption line in the magneto-optical response of graphene.
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DOI：
10.1103/physrevlett.98.157402
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发表时间：
2006-07
影响因子：
8.6
通讯作者：
V. Gusynin;S. Sharapov;J. P. Carbotte
中科院分区：
文献类型：
--
作者：
V. Gusynin;S. Sharapov;J. P. Carbotte
石墨烯的红外电导率中吸收线的强度和能量位置都表现出与其准粒子的狄拉克性质直接相关的特征。我们表明，随着化学势的变化，吸收线的图案的演变编码的异常最低朗道能级的存在的信息。与该能级相关的第一条吸收线总是以全强度出现或完全消失，而所有其他线在两个步骤中消失。我们证明，如果间隙的发展，主要的吸收线分裂成两个提供的化学势是大于或等于差距。
The intensity as well as position in energy of the absorption lines in the infrared conductivity of graphene, both exhibit features that are directly related to the Dirac nature of its quasiparticles. We show that the evolution of the pattern of absorption lines as the chemical potential is varied encodes the information about the presence of the anomalous lowest Landau level. The first absorption line related to this level always appears with full intensity or is entirely missing, while all other lines disappear in two steps. We demonstrate that if a gap develops, the main absorption line splits into two provided that the chemical potential is greater than or equal to the gap.