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

Author

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

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

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.

Published
2014
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