Dlimi S.1, Elmourabit F.1, Id Ouissaaden F.1, Khoukh A.1, Limouny L.2, Baghaz E.3, Elkhatat H.4, El kaaouachi A.5
1LSTIC, Physics Dept., Faculty of Sciences, Chouaib Doukkali University, El Jadida, Morocco
2ESIM, Physics Dept., Faculty of Sciences and Technics, Errachidia, Morocco
3Physics Dept., Faculty of Sciences, Chouaib Doukkali University, El Jadida, Morocco
4Electrical Engineering Department, National School of Applied Sciences, Tangier, Morocco
5Physics Dept., Faculty of Sciences, Ibn Zohr University, Agadir, Morocco
Email: dlimi1975@gmail.com
In this paper, we report the conductivity behavior in the insulating phase at zero magnetic field. We have theoretically investigated the temperature dependence of the electrical conductivity of wet spun graphene fiber and its composites. The temperature dependence of electronic conduction follows the law sigma ~ exp(E0/E)m. Indeed, the electronic conduction is dominated by the coexistence of two regimes: Efros-Shklovskii variable range hopping mechanism where m=1/2 and the activated mechanism where m=1. By using two different methods: the numerical method based on the calculation of the percentage deviation Dev (%) and the conductance curve derivative analysis method which is based on the logarithmic derivative function W=dlnsigma/dln E, we have found the exponent m is close to 1. Keywords: graphene, Electrical conductivity, Variable range hopping conduction. DOI: 10.61011/TPL.2023.08.57067.19526
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