Alternative equation of motion approach applied to transport through a quantum dot

作者：Gorski Grzegorz^*; Mizia Jerzy; Kucab Krzysztof

来源：Physica E: Low-Dimensional Systems and Nanostructures , 2015, 73: 76-82.

DOI：10.1016/j.physe.2015.05.021

• Quantum dot
• Equation of motion
• Green function
• Differential conductance

We study non-equilibrium electron transport through a quantum clot coupled to metallic leads. We use an alternative equation of motion approach in which we calculate the retarded Green function of the impurity by differentiating Green functions over both time variables. Such an approach allows us to obtain the resonance Rondo state in the particle-hole symmetric case and in the asymmetric cases. We apply this technique for calculating the density of the states of quantum dot and the differential conductance as a function of bias voltage. The differential conductance dependence on temperature and on Coulomb interaction is also calculated.

• 出版日期2015-9