Fano-Rashba effect in quantum dots

TL;DR

This paper investigates how the Fano-Rashba effect influences electronic transport in a quantum dot with Rashba spin-orbit coupling connected to ferromagnetic leads, highlighting interference phenomena affecting spin-polarized states.

Contribution

It introduces the concept of the Fano-Rashba effect in quantum dots and analyzes its dependence on magnetic field and spin-orbit coupling, a novel insight into spin-dependent transport phenomena.

Findings

Fano-Rashba effect causes interference between localized and resonant electron states.

The effect varies with magnetic field and Rashba spin-orbit coupling strength.

Interference impacts spin-polarized electron transport in quantum dots.

Abstract

We consider the electronic transport through a Rashba quantum dot coupled to ferromagnetic leads. We show that the interference of localized electron states with resonant electron states leads to the appearance of the Fano-Rashba effect. This effect occurs due to the interference of bound levels of spin-polarized electrons with the continuum of electronic states with an opposite spin polarization. We investigate this Fano-Rashba effect as a function of the applied magnetic field and Rashba spin-orbit coupling.