Non-equilibrium slave bosons approach to quantum pumping in interacting quantum dots

Progress in Non-equilibrium Green's Functions

Citro, Roberta^1,2 ; Romeo, Francesco^1,2

Dipartimento di Fisica E. R. Caianiello, University of Salerno, Via Giovanni Paolo II, Fisciano

I-84084, Italy^1

Spin-CNR UoS of Salerno, Fisciano

I-84084, Italy^2

关键词: Dynamical constraints;    Non equilibrium;    Non-equilibrium Green's function;    Parasitic current;    Quantum pumping;    Slave bosons;    Spintronics application;    Time dependent;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/696/1/012014/pdf
DOI  :  10.1088/1742-6596/696/1/012014

来源: IOP

【 摘 要 】

We review a time-dependent slave bosons approach within the non-equilibrium Green's function technique to analyze the charge and spin pumping in a strongly interacting quantum dot. We study the pumped current as a function of the pumping phase and of the dot energy level and show that a parasitic current arises, beyond the pure pumping one, as an effect of the dynamical constraints. We finally illustrate an all-electrical mean for spin-pumping and discuss its relevance for spintronics applications.