Low Temperature Correlation Lengths of Bilayer Heisenberg AntiFerromagnets and Neutron Scattering

Details Low Temperature Correlation Lengths of Bilayer Heisenberg AntiFerromagnets and Neutron Scattering Low Temperature Correlation Lengths of Bilayer Heisenberg AntiFerromagnets and Neutron Scattering

1997-03-13

arxiv.org/abs/cond-mat/9703138v1

Physics

Condensed Matter

Strongly Correlated Electrons

12 pages, RevTex, 1 Figure

Scientific paper

The low temperature correlation length and the static structure factor are computed for bilayer antiferromagnets such as YBa_2Cu_3O_6. It is shown that energy integrated two-axis scan in neutron scattering experiments can be meaningfully interpreted to extract correlation length in such bilayer antiferromagnets despite intensity modulation in the momentum perpendicular to the layers. Thus, precise measurements of the spin-spin correlation length can be performed in the future, and the theoretical predictions can be tested. It is also shown how the same correlation length can be measured in nuclear magnetic resonance experiments.

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