| Issue |
Europhys. Lett.
Volume 50, Number 3, May I 2000
|
|
|---|---|---|
| Page(s) | 389 - 394 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2000-00103-6 | |
| Published online | 01 September 2002 | |
Exact trimer ground states on a spin-1 chain
1
Research Institute for Solid State Physics and Optics
H-1525 Budapest, P.O. Box 49, Hungary
2
Institut für Theoretische Physik, Universität zu Köln
Zülpicherstr. 77, 50937 Köln, Germany
Corresponding authors: solyom@mail.szfki.kfki.hu zitt@thp.uni-koeln.de
Received:
27
October
1999
Accepted:
28
February
2000
We construct for the first time a spin-1 model on a chain, which has an exactly solvable threefold degenerate ground state. The ground-state wave function breaks translational symmetry, thus we have trimerization. Excited states cannot be obtained exactly, but we determine a few low-lying ones by using trial states, among them solitons.
PACS: 75.10.Jm – Quantized spin models
© EDP Sciences, 2000
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