Graphene Nanoribbon Simulator of Electronic Properties Using MATLAB

In this research, a comprehensive simulation tool based on graphene and code named the Graphene Nanoribbon Simulator (GNRSIM) of electronic properties is developed with a graphical user interface (GUI). GNRSIM is based on the tight binding Hamiltonian (TBH) model where the Eigenvalues provide the band structure. The density of states (DOS) is computed by solving Green's Function. The interface of the GNRSIM is generated using the GUI Development Environment (GUIDE) in MATLAB that allows a user to key in four input parameters. The user can select the type of edges of the GNR, namely armchair or zigzag, its chirality (n, m) and the tight binding energy. It can simulate the electronic properties of the semiconductor, including the band structure, and the DOS can calculate the material width and length. These properties are important for understanding the electronic characteristics of nanoscale graphene. The output characteristics are shown graphically on the simulator. GNRSIM is developed to be a stand-alone application software that does not require the installation of MATLAB.