Anisotropic Quantum Spin Chains

Authors

J. Kurmann
Gerhard Müller, University of Rhode IslandFollow
H. Thomas
M. W. Puga
H. Beck

Document Type

Article

Date of Original Version

3-1981

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 h^1/3 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.

Citation/Publisher Attribution

Kurmann, J., Müller, G., Thomas, H., Puga, M. W., & Beck, H. (1981). Anisotropic quantum spin chains. J. Appl. Phys., 52, 1968-1970. doi :10.1063/1.329586

Available at: http://dx.doi.org/10.1063/1.329586

Publisher Statement

Copyright 1981 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

The following article appeared in Journal of Applied Physics and may be found at http://dx.doi.org/10.1063/1.329586.