Lifetime and dynamics of polaron and bipolaron in graphene nanoribbon under laser
Laboratory of Condensed Matter-Electronics and Signal Processing (LAMACET), Department of Physics, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon
2 Popular Outcome for Fundamental Sciences and Innovative (SIPOF), Dschang, Cameroon
3 International Chair in Mathematical Physics and Applications (ICMPA-UNESCO Chair), University of Abomey-Calavi, 072 P.O. Box 50, Cotonou, Republic of Benin
Accepted: 29 May 2020
Published online: 5 June 2020
In this paper, we have investigated the lifetime, mobility and effective mass of polaron and bipolaron in graphene under laser field by using the well-known Lee–Low–Pines transformations. In this study, it is seen that the laser affects mostly the dynamics parameters of polaron and bipolaron in graphene. We found that the laser reduces the lifetime of the polaron in the fundamental state and increases it in its excited state. The excited polaron survives to the effects of laser more than the excited bipolaron. However, the polaron and bipolaron in the fundamental state have about the same laser sensitivity. The polaron and bipolaron in graphene become less heavy; under laser, they get massless. Polaron and bipolaron present a good mobility as charge carriers in the presence of laser effect.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2020