Spin waves in magnetic quantum wells with Coulomb interaction and $sd$ exchange coupling
Mesoscale and Nanoscale Physics
2015-05-20 v1
Abstract
We theoretically describe the spin excitation spectrum of a two dimensional electron gas embedded in a quantum well with localized magnetic impurities. Compared to the previous work, we introduce equations that allow to consider the interplay between the Coulomb interaction of delocalized electrons and the exchange coupling between electrons and magnetic impurities. Strong qualitative changes are found : mixed waves propagate below the single particle continuum, an anticrossing gap is open at a specific wavevector and the kinetic damping due to the electron motion strongly influences the coupling strength between electrons and impurities spins.
Cite
@article{arxiv.1011.4422,
title = {Spin waves in magnetic quantum wells with Coulomb interaction and $sd$ exchange coupling},
author = {Florent Perez and Joel Cibert and Masha Vladimirova and Denis Scalbert},
journal= {arXiv preprint arXiv:1011.4422},
year = {2015}
}