خصائص نقل الإلكترون خلال جزيئة نقاط كمية

Abstract EN

In this study, we introduce a theoretical treatment for the electron transport through a system consists of two quantum dots coupled serially, which can be regarded as a quantum dots molecule, embedded between two nonmagnetic leads (source and drain) .

In our treatment, the Anderson-Newns Hamiltonian model is considered as a basis to study the system dynamics and then to derive analytical formulas to calculate the occupation numbers of the quantum dots energy levels and the tunneling current .

The differential conductance is also numerically calculated and discussed extendedly .

We conclude that the efficiency of electron transport depends on the system characteristics, such us the energy levels of the quantum dots and the Coulomb repulsion energy between electrons with opposite spin at the quantum dots .

We also conclude that the calculation of the molecular virtual energy levels is of most importance to determine the bias voltage values at which the conductance is peaked .