Spin waves in doped graphene: A time-dependent spin density functional approach to collective excitations in paramagnetic two-dimensional Dirac fermion gases
Journal Article
·
· Physical Review B
- Univ. of Missouri, Columbia, MO (United States); University of Missouri
- Université Pierre & Marie Curie, Paris VI, Paris (France). Institut des Nanosciences de Paris; Centre National de la Recherche Scientifique (CNRS) (France)
- Univ. of Missouri, Columbia, MO (United States)
In spin-polarized itinerant electron systems, collective spin-wave modes arise from dynamical exchange and correlation (xc) effects. We consider here 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-Sjölander approximations. We obtain spin-wave dispersions and spin stiffnesses as a function of doping and spin polarization, and we discuss the prospects for their experimental observation.
- Research Organization:
- Univ. of Missouri, Columbia, MO (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0019109
- OSTI ID:
- 1836535
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 24 Vol. 104; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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