SPIN-WAVE DYNAMICS IN REAL CRYSTALS

Authors
NIU Q KLEINMAN L
Citation
Q. Niu et L. Kleinman, SPIN-WAVE DYNAMICS IN REAL CRYSTALS, Physical review letters, 80(10), 1998, pp. 2205-2208
Citations number
10
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
80
Issue
10
Year of publication
1998
Pages
2205 - 2208
Database
ISI
SICI code
0031-9007(1998)80:10<2205:SDIRC>2.0.ZU;2-O
Abstract
We derive the spin-wave dynamics in crystals from the time-dependent v ariational principle, which involves Berry phase terms as well as the energy of frozen spin waves. The general formulation is based on the a diabatic and harmonic approximations. Formulas for ferromagnets and an tiferromagnets are derived in terms of Kohn-Sham wave functions, which are particularly suitable for practical ab initio calculations.