Rigorous results on a first-order phase transition in antiferromagnetic spin-1/2 coupled chains
Journal Article
·
· Physical Review, B: Condensed Matter
- Department of Mathematics, University of Manchester Institute of Science and Technology (UMIST), P.O. Box 88, Manchester M60 1QD (United Kingdom)
Some rigorous results are presented for a first-order quantum phase transition between the dimerized state and Haldane-type state (i.e., a state similar to the ground state of the one-dimensional spin-1 Heisenberg chain) in the spin-1/2 coupled chains with nearest-neighbor and next-nearest-neighbor Heisenberg interactions. Also presented is a class of exact excited states in both phases. A partial phase diagram of the general spin-1/2 coupled chains is discussed.
- OSTI ID:
- 122305
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 17 Vol. 52; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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