https://doi.org/10.1140/epjp/s13360-022-03171-y
Regular Article
Spin–orbit interaction and laser field radiation frequency effects on optical absorption coefficient and thermodynamics properties of doped graphene
Laboratory of Condensed Matter-Electronics and Signal Processing (LAMACET), Department of Physics, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon
Received:
31
March
2022
Accepted:
8
August
2022
Published online:
7
September
2022
We study the effects of Rashba spin–orbit coupling on thermodynamics properties and the effect of substrate and laser field radiation frequency on optical absorption coefficient of doped graphene under laser field irradiation. The variational method of Lee–Low–Pines and Devreese, Huybrechts, and Lemmens (DHL) formalism are used to obtain ground state energy and optical absorption coefficient, respectively. It is found that when the laser field radiation frequency and laser amplitude increase the optical absorption increases and decreases when the internal distance of polar substrate increases, obviously the peak tends to reduce. The entropy decreases and reaches its lowest values in particular with h-BN substrate. For high values of Rashba parameter and laser frequency the entropy exhibits saturation. Thus, the presence of the Rashba parameter reduces disorder, improves coherence and stability in graphene. These results offer the possibility to tune the thermodynamics parameters and optical absorption coefficient through the external parameters.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
