Quasiparticle dynamics in ferromagnetic compounds of the Co-Fe and Ni-Fe systems

Abstract

We report a theoretical study of the quasiparticle lifetime and the quasiparticle mean free path caused by inelastic electron-electron scattering in ferromagnetic compounds of the Co-Fe and Ni-Fe systems. The study is based on spin-polarized calculations, which are performed within the $GW$ approximation for equiatomic and Co- and Ni-rich compounds, as well as for their constituents. We mainly focus on the spin asymmetry of the quasiparticle properties, which leads to the spin-filtering effect experimentally observed in spin-dependent transport of hot electrons and holes in the systems under study. By comparing with available experimental data on the attenuation length, we estimate the contribution of the inelastic mean free path to the latter.

10 pages, 10 figures

References in corpus (5)

• Calculations of Hubbard U from first-principles
• Screened Coulomb interaction in the maximally localized Wannier basis
• Theory of quasiparticle spectra for Fe, Co, and Ni: bulk and surface
• About the strength of correlation effects in the electronic structure of iron
• Variational solution of the T-matrix integral equation

Cited by in corpus (5)

• Ideal two-dimensional electron systems with a giant Rashba-type spin splitting in real materials: surfaces of bismuth tellurohalides
• Tuning Spin Current Injection at Ferromagnet/Non-Magnet Interfaces by Molecular Design
• First principles quasiparticle damping rates in bulk lead
• Low-energy spin precession in the molecular field of a magnetic thin film
• Optimizing spin-based terahertz emission from magnetic heterostructures