Spin flop in one-dimensional quantum antiferromagnets

Details Spin flop in one-dimensional quantum antiferromagnets Spin flop in one-dimensional quantum antiferromagnets

1999-02-20

arxiv.org/abs/cond-mat/9902281v1

Physics

Condensed Matter

Statistical Mechanics

5 pages, Revtex, with 4 eps figures

Scientific paper

10.1103/PhysRevB.60.6238

The field-induced transition corresponding to the spin flop in the quantum antiferromagnetic chains in the presence of the Ising-like single-ion anisotropy D (<0) is studied by the finite-cluster analysis. It is found that for $S\geq {3\over 2}$ a first-order metamagnetic transition occurs even in one dimension for small negative D except for the Haldane phase, while there exist two second-order transitions and an incommensurate phase appears between them for intermediate D, as already found for S=1. We also discuss on some experiments of CsNiCl$_3$ related with the present work.

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