Dephasing in ferromagnetic nanowires: The role of spin waves

TL;DR

This paper investigates electron dephasing in ferromagnetic nanowires due to spin wave interactions, providing explicit results for quasi-one-dimensional systems without relying on small exchange splitting or diffusion approximation.

Contribution

It offers a comprehensive calculation of dephasing times considering broader conditions than previous models, including arbitrary exchange splitting and non-diffusive transport.

Findings

Explicit dephasing time results for quasi-1D ferromagnetic wires

Analysis beyond small exchange splitting approximation

Calculation not limited to diffusion regime

Abstract

We present a calculation of the dephasing time of electrons in a ferromagnet relevant for the conductance fluctuations. We focus on the contribution from the interaction with spin waves. Explicit results are presented for a quasi-one-dimensional systems. Going beyond previous calculations, we do not restrict ourselves to the limit of a small exchange splitting compared to the electronic elastic scattering time, nor does our calculation rely on the diffusion approximation to describe electronic transport.