Non-stoner continuum in the double exchange model

Citation
Ta. Kaplan et al., Non-stoner continuum in the double exchange model, PHYS REV L, 86(16), 2001, pp. 3634-3637
Citations number
26
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
86
Issue
16
Year of publication
2001
Pages
3634 - 3637
Database
ISI
SICI code
0031-9007(20010416)86:16<3634:NCITDE>2.0.ZU;2-O
Abstract
Exact diagonalization studies of the double exchange model indicate the exi stence of continuum states in the single-spin-flip channel that overlap the magnons at very low energies (approximate to 10(-2) eV) and extend to high energies (approximate to eV). This picture differs dramatically from the p revalent view, where there are the magnons, plus the Stoner continuum at th e high-energy scale, with nothing in between. The relevance of these new co ntinuum states to inelastic neutron scattering and optical properties is di scussed.