Anisotropic quantum spin chains
- 1 March 1981
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 52 (3) , 1968-1970
- https://doi.org/10.1063/1.329586
Abstract
We have studied two models for anisotropic quantum spin chains. (i) XY‐chain with a field in the plane: The magnetization of the ferromagnet behaves as h1/3 for small fields, in agreement with scaling laws. The antiferromagnet shows a critical field at which the ground state is a simple Néel state and which separates power law from exponential decay of spatial correlations. (ii) Anisotropic XY‐chain: The dynamic z‐component spin correlation function can be decomposed into a spin wave and a soliton contribution. The nature of quantum soliton excitations is studied and their form compared to soliton solutions of classical equations of motion.This publication has 9 references indexed in Scilit:
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