Stability of the Haldane phase in anisotropic magnetic ladders

Details Stability of the Haldane phase in anisotropic magnetic ladders Stability of the Haldane phase in anisotropic magnetic ladders

1998-09-02

arxiv.org/abs/cond-mat/9809037v1

Phys Rev B 56 14449(1997)

Physics

Condensed Matter

Strongly Correlated Electrons

19 pages, 5 figures

Scientific paper

10.1103/PhysRevB.56.14449

We have considered the properties of anisotropic two-leg ladder models with S=1/2 or S=1 spins on the rungs, using White's density matrix renormalization group method. We have generalized the method by taking into account the symmetries of the model in order to reduce the dimensions of the matrix to be diagonalized, thereby making possible to consider more states. The boundaries in the parameter space of the extended region, where the Haldane phase exists, are estimated.

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