info:eu-repo/semantics/article
Optical conductivity in an effective model for graphene: finite temperature corrections (015401)
Fecha
2019-12Registro en:
Falomir, Horacio Alberto; Muñoz, Enrique; Loewe, Marcelo; Zamora, Renato; Optical conductivity in an effective model for graphene: finite temperature corrections (015401); IOP Publishing; Journal of Physics A: Mathematical and Theoretical; 53; 12-2019; 1-21
1751-8113
CONICET Digital
CONICET
Autor
Falomir, Horacio Alberto
Muñoz, Enrique
Loewe, Marcelo
Zamora, Renato
Resumen
In this article, we investigate the temperature and chemical potential dependence of the optical conductivity of graphene, within a field theoretical representation in the continuum approximation, arising from an underlying tight-binding atomistic model, that includes up to second-nearest neighbors coupling. Our calculations allow us to obtain the dependence of the optical conductivity on frequency, temperature and finite chemical potential, thus generalizing our previously reported calculations at zero temperature, and reproducing the universal and experimentally verified value at zero frequency. Moreover, we also show that a small but still measurable shift in the conductance minimum arises as a function of the second-nearest neighbors hopping t´, thus providing the possibility to directly measure this parameter in transport experiments.