Nonequilibrium Kondo problem with spin-dependent chemical potentials: Exact results

TL;DR

This paper provides an exact solution to the nonequilibrium Kondo problem with spin-dependent chemical potentials, enabling precise calculation of charge and spin currents and magnetic properties, especially relevant for ferromagnetic lead systems.

Contribution

It offers an exact analytical solution at a special parameter point for the nonequilibrium Kondo problem with spin-dependent potentials, advancing understanding of spintronic systems.

Findings

Exact solution for the nonequilibrium Kondo problem at a special parameter point.

Computed charge current, spin current, and magnetic properties.

Application to ferromagnetically polarized lead systems.

Abstract

We give a brief review of the Kondo effect and exactly solve the nonequilibrium Kondo problem at the special point in the parameter space of the model with spin-dependent chemical potentials. Using the obtained solution, we compute several experimentally observable quantities: charge current, spin current and magnetic properties. Applications to the physically important cases such as the case where the impurity spin is placed in between two ferromagnetically polarized leads are discussed.