NONADIABATIC APPROACH TO SPIN-PEIERLS TRANSITIONS VIA FLOW EQUATIONS

Authors
UHRIG GS
Citation
Gs. Uhrig, NONADIABATIC APPROACH TO SPIN-PEIERLS TRANSITIONS VIA FLOW EQUATIONS, Physical review. B, Condensed matter, 57(22), 1998, pp. 14004-14007
Citations number
40
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
57
Issue
22
Year of publication
1998
Pages
14004 - 14007
Database
ISI
SICI code
0163-1829(1998)57:22<14004:NATSTV>2.0.ZU;2-A
Abstract
The validity of the adiabatic approach to spin-Peierls transitions is assessed. An alternative approach is developed which maps the initial magnetoelastic problem to an effective magnetic problem only. Thus the equivalence of magnetoelastic solitons and magnetic spinons is shown. No soft phonon is required for the transition. Temperature-dependent couplings are predicted in accordance with the analysis of experimenta l data.