title: Optical conductivity of ABA stacked graphene trilayer: mid-IR resonance due to band nesting.
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.
authors.affiliation: Centro de Física and Departamento de Física, Universidade do Minho, Campus de Gualtar, Braga 4710-057, Portugal. Department of Physics, Faculty of Science, Lorestan university(lu), Lorestan, Iran.
authors.forename: Zeinab
authors.initials: Z
authors.lastname: Rashidian
authors.forename: Yuliy V
authors.initials: YV
authors.lastname: Bludov
authors.forename: Ricardo M
authors.initials: RM
authors.lastname: Ribeiro
authors.forename: N M R
authors.initials: NM
authors.lastname: Peres
authors.forename: Mikhail I
authors.initials: MI
authors.lastname: Vasilevskiy