Spin waves in doped graphene: a time-dependent spin-density-functional approach to collective excitations in paramagnetic two-dimensional Dirac fermion gases
Mesoscale and Nanoscale Physics
2022-01-05 v1
Abstract
In spin-polarized itinerant electron systems, collective spin-wave modes arise from dynamical exchange and correlation (xc) effects. We here consider spin waves in doped paramagnetic graphene with adjustable Zeeman-type band splitting. The spin waves are described using time-dependent spin-density-functional response theory, treating dynamical xc effects within the Slater and Singwi-Tosi-Land-Sjolander approximations. We obtain spin-wave dispersions and spin stiffnesses as a function of doping and spin polarization, and discuss prospects for their experimental observation.
Keywords
Cite
@article{arxiv.2110.00045,
title = {Spin waves in doped graphene: a time-dependent spin-density-functional approach to collective excitations in paramagnetic two-dimensional Dirac fermion gases},
author = {Matthew J. Anderson and Florent Perez and Carsten A. Ullrich},
journal= {arXiv preprint arXiv:2110.00045},
year = {2022}
}
Comments
14 pages, 8 figures