Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Ground-state properties of antiferromagnetic Heisenberg spin rings
Autore:
Barwinkel, K; Schmidt, HJ; Schnack, J;
Indirizzi:
Univ Osnabruck, Fachbereich Phys, D-49069 Osnabruck, Germany Univ Osnabruck Osnabruck Germany D-49069 hys, D-49069 Osnabruck, Germany
Titolo Testata:
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
fascicolo: 2-3, volume: 220, anno: 2000,
pagine: 227 - 234
SICI:
0304-8853(200010)220:2-3<227:GPOAHS>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENTRAPPING ALKALINE IONS; MAGNETIC-ANISOTROPY; IRON(III) IONS; CLUSTERS; DYNAMICS; OXIDES; SITES;
Keywords:
Heisenberg model; spin ring; antiferromagnetic ground-state; Lieb-Mattis theorem;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Schnack, J Univ Osnabruck, Fachbereich Phys, Barbarastr 7, D-49069 Osnabruck, Germany Univ Osnabruck Barbarastr 7 Osnabruck Germany D-49069 Germany
Citazione:
K. Barwinkel et al., "Ground-state properties of antiferromagnetic Heisenberg spin rings", J MAGN MAGN, 220(2-3), 2000, pp. 227-234

Abstract

Exact ground-state properties of antiferromagnetic Heisenberg spin rings with isotropic next-neighbor interaction are presented for various numbers of spin sites and spin quantum numbers. Earlier work by Peierls, Marshall, Leib, Schultz and Mattis focused on bipartite lattices and is not applicableto rings with an odd number of spins. With the help of exact diagonalization methods we find a more general systematic behavior which for instance relates the number of spin sites and the individual spin quantum numbers to the degeneracy of the ground state. These numerical findings all comply withrigorous proofs in the cases where a general analysis could be carried out. Therefore, it can be plausibly conjectured that the ascertained properties hold for ground states of arbitrary antiferromagnetic Heisenberg spin rings. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 16/07/20 alle ore 05:03:34