Mixed Heisenberg chains: I. The ground-state problem
Abstract
We consider a mechanism for competing interactions in alternating Heisenberg spin chains due to the formation of local spin-singlet pairs. The competition of spin-1 and spin-0 states reveals hidden Ising symmetry of such alternating chains.
- Publication:
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Journal of Physics Condensed Matter
- Pub Date:
- October 1997
- DOI:
- arXiv:
- arXiv:cond-mat/9703206
- Bibcode:
- 1997JPCM....9.9031N
- Keywords:
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- Condensed Matter - Strongly Correlated Electrons;
- Condensed Matter - Statistical Mechanics
- E-Print:
- 7 pages, RevTeX, 4 embedded eps figures, final version