Effects of screening on the optical absorption in graphene and in metallic monolayers

Jablan, Marinko and Soljačić, Marin and Buljan, Hrvoje (2014) Effects of screening on the optical absorption in graphene and in metallic monolayers. Physical Review B, 89 (8). pp. 85415-9. ISSN 1098-0121

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Screening is one of the fundamental concepts in solid-state physics. It has a great impact on the electronic properties of graphene, where huge mobilities were observed in spite of the large concentration of charged impurities. While static screening has successfully explained dc mobilities, screening properties can be significantly changed at infrared or optical frequencies. In this paper, we discuss the influence of dynamical screening on the optical absorption of graphene and other two-dimensional electron systems such as metallic monolayers. This research is motivated by recent experimental results that pointed out that graphene plasmon linewidths and optical scattering rates can be much larger than scattering rates determined by dc mobilities. Specifically, we discuss a process in which a photon incident on a graphene plane can excite a plasmon by scattering from an impurity, or a surface optical phonon of the substrate.

Item Type: Article
Date: February 2014
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2014) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 02 Jul 2014 13:01
Last Modified: 15 Mar 2015 14:02
URI: http://digre.pmf.unizg.hr/id/eprint/2388

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