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arXiv 1402.7218cond-mat.mes-hall
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ABA堆叠石墨烯三层的光学电导率:由于能带嵌套引起的中红外共振

Optical conductivity of ABA stacked graphene trilayer: mid-IR resonance due to band nesting

Zeinab Rashidian, Yuliy V. Bludov, Ricardo M. Ribeiro, Nuno M. R. Peres, Mikhail I. Vasilevskiy

摘要:

计算了ABA(Bernal型)堆叠石墨烯三层的能带结构和光学电导率。结果表明,在适当的掺杂,一个强的共振峰的发展在光学电导率,位于对应于约1.4倍的层间跳跃能量的频率和所造成的“嵌套”的两个近抛物线带的电子光谱。这种共振吸收的强度可以通过调节栅极电压来控制。该效应对于温度升高是稳健的。

英文摘要:

The band structure and the optical conductivity of an ABA (Bernal-type) stacked graphene trilayer are calculated. It is shown that, under appropriate doping, a strong resonant peak develops in the optical conductivity, located at the frequency corresponding to approximately 1.4 times the interlayer hopping energy and caused by the 'nesting' of two nearly parabolic bands in the electronic spectrum. The intensity of this resonant absorption can be controlled by adjusting the gate voltage. The effect is robust with respect to increasing temperature.

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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