Dresden 2020 – scientific programme

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DS: Fachverband Dünne Schichten

DS 18: Transport Properties

DS 18.5: Talk

Tuesday, March 17, 2020, 12:45–13:00, CHE 89

Calculating DC Conductivity in Substitutionally Disordered Graphene using the Kubo-Greenwood Formula — •Jacob Robbins and Jorge Sofo — The Pennsylvania State University, University Park, USA

We develop a method for calculating the electronic transport in monolayer graphene with a small percentage of carbon atoms substituted for nitrogen impurities. The Hamiltonian is treated in the tight binding approximation, with only nearest neighbor hopping included. While many authors find DC conductivity in such systems using the adiabatic electric field of Kubo (1957), we apply the perturbation theory approach of Greenwood (1958). This distinction allows us to find the DC conductivity of finite systems, without equilibrating to infinite time, at which point all conduction has ceased.