THERMODYNAMIC PROPERTIES OF THE HALDANE SPIN CHAIN - A STATISTICAL-MODEL FOR THE ELEMENTARY EXCITATIONS

Authors
REGNAULT LP ZALIZNYAK IA MESHKOV SV
Citation
Lp. Regnault et al., THERMODYNAMIC PROPERTIES OF THE HALDANE SPIN CHAIN - A STATISTICAL-MODEL FOR THE ELEMENTARY EXCITATIONS, Journal of physics. Condensed matter, 5(50), 1993, pp. 677-684
Citations number
17
Categorie Soggetti
Physics, Condensed Matter
Journal title
Journal of physics. Condensed matter → ACNP
ISSN journal
09538984
Volume
5
Issue
50
Year of publication
1993
Pages
677 - 684
Database
ISI
SICI code
0953-8984(1993)5:50<677:TPOTHS>2.0.ZU;2-G
Abstract
The low-temperature behaviour of the thermodynamic quantities in the o ne-dimensional 1D antiferromagnet with a Haldane ground state was anal ysed using a concept of non-interacting quasiparticles as a starting p oint The proposed description appeared to be in good agreement with th e results of the Monte Carlo study of a 128-site spin chain and experi mental data obtained in NFNP (Ni(C2H8N2)2NO2ClO4) provided that the el ementary excitations constituting the Haldane triplet obey Fermi stati stics.