NUMERICAL EVALUATION OF FREQUENCY-MOMENT SUM-RULES FOR DYNAMICAL STRUCTURE FACTORS

Authors
FLEDDERJOHANN A KARBACH M MUTTER KH
Citation
A. Fledderjohann et al., NUMERICAL EVALUATION OF FREQUENCY-MOMENT SUM-RULES FOR DYNAMICAL STRUCTURE FACTORS, Physical review. B, Condensed matter, 53(17), 1996, pp. 11543-11549
Citations number
12
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
53
Issue
17
Year of publication
1996
Pages
11543 - 11549
Database
ISI
SICI code
0163-1829(1996)53:17<11543:NEOFSF>2.0.ZU;2-M
Abstract
The frequency moments of the zero-temperature dynamical structure fact or in the antiferromagnetic Heisenberg model are computed on rings up to 28 sites. Finite-size effects are analyzed and the estimate of the thermodynamical limit is compared with the two-spinon ansatz of Muller and with a modification of this ansatz for the dynamical structure fa ctor.