The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 16 1 2019 11 26 The effect of side quantum dots on conductance through four-quantum-dot combinations: study by non-equilibrium Greens function method The effect of side quantum dots on conductance through four-quantum-dot combinations: study by non-equilibrium Greens function method 123 126 1184 10.18869/acadpub.ijpr.16.1.123 FA Z Darizin M Bagheri H Rahimpoor Soleymani Journal Article 2019 11 26 Electronic transport has been investigated in four-quantum-dot combination coupled to metal electrodes using the non-equilibrium Green’s function method, and curves I-V and conductance (dI/dV) were analyzed for special combination. We have showed that the emergence of negative differential conductivity is due to asymmetric distribution of quantum dots in the central region, existence of non-coupled dots (side quantum dots), and the interference effect. We found that more side quantum dots lead to more negative differential conductance. Electronic transport has been investigated in four-quantum-dot combination coupled to metal electrodes using the non-equilibrium Green’s function method, and curves I-V and conductance (dI/dV) were analyzed for special combination. We have showed that the emergence of negative differential conductivity is due to asymmetric distribution of quantum dots in the central region, existence of non-coupled dots (side quantum dots), and the interference effect. We found that more side quantum dots lead to more negative differential conductance. https://ijpr.iut.ac.ir/article_1184_97af4fb322bb5c8973ade16764156bed.pdf