| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|---|---|---|
| Page(s) | C8-1411 - C8-1412 | |
| DOI | https://doi.org/10.1051/jphyscol:19888648 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1411-C8-1412
DOI: 10.1051/jphyscol:19888648
Department of Physics, Kobe University, Rokkodai, Kobe 657, Japan
J. Phys. Colloques 49 (1988) C8-1411-C8-1412
DOI: 10.1051/jphyscol:19888648
GROUND-STATE PROPERTIES OF THE ONE-DIMENSIONAL SPIN-1/2 HEISENBERG-XY ANTIFERROMAGNET WITH COMPETING INTERACTIONS
T. Tonegawa et I. HaradaDepartment of Physics, Kobe University, Rokkodai, Kobe 657, Japan
Abstract
We study the ground-state properties of the one-dimensional spin-1/2 Heisenberg-XY magnet with antiferromagnetic first- and second-neighbor interactions. Extrapolating exact results for finite-size systems of up to 20 spins, we estimate the behavior at the infinite-size limit. The limiting ground state has a finite gap when the second-neighbor interaction is sufficiently large.