ONE-DIMENSIONAL HEISENBERG ANTIFERROMNAGNET IN WHICH 2 S=1 2 AND 2 S=1 SPINS ARE ARRANGED ALTERNATIVELY/

Authors
TONEGAWA T HIKIHARA T NISHINO T KABURAGI M MIYASHITA S MIKESKA HJ
Citation
T. Tonegawa et al., ONE-DIMENSIONAL HEISENBERG ANTIFERROMNAGNET IN WHICH 2 S=1 2 AND 2 S=1 SPINS ARE ARRANGED ALTERNATIVELY/, Journal of magnetism and magnetic materials, 177, 1998, pp. 647-649
Citations number
9
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Journal of magnetism and magnetic materials → ACNP
ISSN journal
03048853
Volume
177
Year of publication
1998
Part
1
Pages
647 - 649
Database
ISI
SICI code
0304-8853(1998)177:<647:OHAIW2>2.0.ZU;2-V
Abstract
Ground-state and thermodynamic properties of the one-dimensional Heise nberg antiferromagnet in which two S = 1/2 and two S = 1 spins are arr anged alternatively are studied by a quantum Monte Carlo method and by analytical estimates. It is found that the ground state of the system undergoes a second-order phase transition which accompanies vanishing of the energy gap. (C) 1998 Elsevier Science B.V. All rights reserved .