Proceedings of the 2014 International Conference on Advances in Education Technology

Simulation of Tunnel Current in an Armchair Graphene Nanoribbon-Based p-n Diode for Undergraduate Physics Students

Authors
Rifky Syariati, Endi Suhendi, Fatimah A. Noor, Khairurrijal
Corresponding author
Syariati
Keywords
Armchair graphene nanoribbon, tunnel current, tight binding, Airy-wave function, gaussian quadrature, diode
Abstract
Simulation of tunnel current flowing in a p-n diode made from armchair graphene nanoribbons (AGNRs) was built. The diode is composed of p-type and n-type AGNRs and bandgaps of the AGNRs are obtained by using a tight binding method. The bandgaps are required to describe a potential profile having a potential barrier of the diode. Transmittance of electrons tunneling through the potential barrier is then calculated by employing Airy wavefunctions. Gaussian quadrature method, which is a numerical approximation, is used to obtain tunnel current in the diode. All steps are visualized by using the graphical user interface of Matlab
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