Connectivity transition in the frustrated S=1 chain revisited

Details Connectivity transition in the frustrated S=1 chain revisited Connectivity transition in the frustrated S=1 chain revisited

2001-10-04

arxiv.org/abs/cond-mat/0110095v1

Phys. Rev. B 65, 100401(R) (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures, Revtex 4, submitted to PRB

Scientific paper

10.1103/PhysRevB.65.100401

The phase transition in the antiferromagnetic isotropic Heisenberg S=1 chain with frustrating next-nearest neighbor coupling alpha is reconsidered. We identify the order parameter of the large-alpha phase as describing two intertwined strings, each possessing a usual string order. The transition has a topological nature determined by the change in the string connectivity. Numerical evidence from the DMRG results is supported by the effective theory based on soliton states.

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