Issue |
Europhys. Lett.
Volume 42, Number 5, June 1998
|
|
---|---|---|
Page(s) | 559 - 564 | |
Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
DOI | https://doi.org/10.1209/epl/i1998-00287-1 | |
Published online | 01 September 2002 |
Spin-spin correlation lengths of bilayer antiferromagnets
1
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
Received:
12
February
1998
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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