| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|
|---|---|---|
| Page(s) | C8-1409 - C8-1410 | |
| DOI | https://doi.org/10.1051/jphyscol:19888647 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1409-C8-1410
DOI: 10.1051/jphyscol:19888647
1 Institut für Theoretische Physik, Universität Hannover, Appelstrasse 2, 3000 Hannover 1, F.R.G.
2 NEC Corporation, Kawasaki, Kanagawa 211, Japan
3 Dept. of Phys., Kobe Univ., Kobe 657, Japan
J. Phys. Colloques 49 (1988) C8-1409-C8-1410
DOI: 10.1051/jphyscol:19888647
DISORDER LINE IN A QUANTUM SPIN CHAIN WITH COMPETING INTERACTIONS
I. Harada1, T. Kimura2 et T. Tonegawa31 Institut für Theoretische Physik, Universität Hannover, Appelstrasse 2, 3000 Hannover 1, F.R.G.
2 NEC Corporation, Kawasaki, Kanagawa 211, Japan
3 Dept. of Phys., Kobe Univ., Kobe 657, Japan
Abstract
The spin-1/2 Heisenberg chain with antiferromagnetic first- and second-neighbor interactions is studied by the cluster transfer-matrix method. It is found that this quantum model exhibits a disorder temperature above which the spin correlation function decays with an incommensurate oscillation while below which it decays antiferromagnetically.