The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 19 1 2019 11 26 The study of electronic conductance of a nanoribbon with square lattice including some impurities The study of electronic conductance of a nanoribbon with square lattice including some impurities 109 115 1419 10.29252/ijpr.19.1.12 FA M Jamshidi Farsani H Rabani 0000-0002-3327-2040 M Mardaani 0000-0002-6268-5311 Journal Article 2019 11 26 In this paper, we study the electronic conductance of a nanoribbon with square lattice by using Green’s function theory within the tight-binding approach. For this purpose, we separate the conductance modes in the ideal parts by using a suitable unitary transformation in order to obtain the analytic formula for the corresponding self-energies. Then, we present a fast computer algorithm based on the Fisher-Lee formula for the calculation of the system conductance. The results show that the distribution of electrical impurities with different on-site energies leads to the different values of the system electronic conductance and it is generally decreasing.   In this paper, we study the electronic conductance of a nanoribbon with square lattice by using Green’s function theory within the tight-binding approach. For this purpose, we separate the conductance modes in the ideal parts by using a suitable unitary transformation in order to obtain the analytic formula for the corresponding self-energies. Then, we present a fast computer algorithm based on the Fisher-Lee formula for the calculation of the system conductance. The results show that the distribution of electrical impurities with different on-site energies leads to the different values of the system electronic conductance and it is generally decreasing.   https://ijpr.iut.ac.ir/article_1419_30c8e1ca872524fbf7ea5c519ca397ee.pdf