Non-Stoner continuum in the double exchange model.
Exact diagonalization studies of the double exchange model indicate the existence of continuum states in the single-spin-flip channel that overlap the magnons at very low energies (approximately 10(-2) eV) and extend to high energies (approximately eV). This picture differs dramatically from the prevalent view, where there are the magnons, plus the Stoner continuum at the high-energy scale, with nothing in between. The relevance of these new continuum states to inelastic neutron scattering and optical properties is discussed.
Kaplan
T A
TA
Michigan State University, East Lansing, Michigan 48824, USA.
Mahanti
S D
SD
Su
Y S
YS