Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin flop in one-dimensional quantum antiferromagnets   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.

14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin