APPROACH TO THE SPIN-1 2 QUANTUM HEISENBERG-MODEL/

Authors
KARBACH M MUTTER KH UEBERHOLZ P KROGER H
Citation
M. Karbach et al., APPROACH TO THE SPIN-1 2 QUANTUM HEISENBERG-MODEL/, Physical review. B, Condensed matter, 48(18), 1993, pp. 13666-13677
Citations number
34
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
48
Issue
18
Year of publication
1993
Pages
13666 - 13677
Database
ISI
SICI code
0163-1829(1993)48:18<13666:ATTS2Q>2.0.ZU;2-M
Abstract
An evolution equation for the expectation values of the Boltzmann fact or between monomervalence-bond states is derived. It contains the whol e information on the thermodynamical and magnetic properties of the sp in-1/2 quantum Heisenberg model. A new approximation scheme is propose d and studied in the thermodynamical limit. To lowest order, it leads to explicit formulas of the internal energy for the antiferromagnetic Heisenberg model in d dimensions.