Температурные зависимости транспортных характеристик углеродных наночастиц

Abstract

Technique for calculating the temperature dependences of transport characteristics of different carbon nanoparticles: single-walled nanotubes, graphene, bilayer graphene in a constant external electric field is proposed. Formulas for conductivity and the diffusion coefficient of electrons in carbon nanostructures obtained analytically and analyzed numerically. Conductivity in single-walled and bilayer carbon nanostructures decreases with increasing temperature. The electrical conductivity of carbon nanoparticles depends nonlinearly on the amplitude of the external constant electric field for various temperatures. With increasing temperature, the coefficient of conductivity decreases. The diffusion coefficient of electrons is independent of temperature for both single-layer and bilayer nanoparticles. A nonlinear dependence of the electron diffusion coefficient on the strength of an external constant electric field is shown. Physical justification of the obtained dependences is propose.