Quantum Effects in the Dynamics of the One-Dimensional Planar Antiferromagnet View Full Text


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Chapter Info

DATE

1981

AUTHORS

Gerhard Müller , Harry Thomas , Marcos W. Puga , Hans Beck

ABSTRACT

In a recent publication /1/ we found that the T=o dynamics of the 1D s=1/2 Heisenberg antiferromagnet (HB AF) with nearest-neighbor exchange interaction J is almost completely dominated by a particular continuum of excitations (called spin-wave continuum, SWC) bounded by the dispersion branches ε1(q) = (πJ/2)sinq and ε2(q)=πJsin(q/2). It differs markedly from the classical 1D HB AF where the spectral weight is concentrated on a single branch of spin-waves. The result for the structure function \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${S_{\mu \mu }}\left( {q,\omega } \right) \equiv {\left\langle {S_l^uS_l^u} \right\rangle _{q,\omega }}$$\end{document} which is a special case of Eq.(6), is in good agreement with low-T neutron scattering data on CPC /2/ concerning excitation energies, lineshapes and integrated intensity. More... »

PAGES

165-168

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-3-642-81592-8_17

DOI

http://dx.doi.org/10.1007/978-3-642-81592-8_17

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1040848513


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