Volume 42, Number 5, June 1998
|Page(s)||559 - 564|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Spin-spin correlation lengths of bilayer antiferromagnets
Department of Physics and Astronomy, University of
California Los Angeles,
CA 90095, USA
2 Institute for Solid State Physics, University of Tokyo Roppongi 7-22-1, Minatoku, Tokyo 106, Japan
Accepted: 17 April 1998
The correlation length and the static structure factor for bilayer antiferromagnets, such as , are calculated using field theoretical and numerical methods. It is shown that these quantities can be directly measured in neutron scattering experiments using energy integrated two-axis scan despite the strong intensity modulation perpendicular to the layers. Our calculations show that the correlation length of the bilayer antiferromagnet diverges considerably more rapidly, as the temperature tends to zero, than the correlation length of the corresponding single-layer antiferromagnet typified by . This rapid divergence may have important consequences with respect to magnetic fluctuations of the doped superconductors.
PACS: 75.10.Jm – Quantized spin models / 74.72.-h – High Tc compounds / 74.72.Bk – Y-based cuprates
© EDP Sciences, 1998
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