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Title: 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
 [1];  [2]; ORCiD logo [3]
  1. Univ. of Missouri, Columbia, MO (United States); University of Missouri
  2. Université Pierre & Marie Curie, Paris VI, Paris (France). Institut des Nanosciences de Paris; Centre National de la Recherche Scientifique (CNRS) (France)
  3. 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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