Spin waves in a dilute Heisenberg antiferromagnet
- 9 December 1971
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 4 (17) , 2929-2936
- https://doi.org/10.1088/0022-3719/4/17/022
Abstract
A Green function calculation for spin waves in a dilute antiferromagnet is presented. By generalizing a calculation of Kaneyoshi (1969) it is shown that in a second order Born approximation the spin wave modes become unstable at C*=0.296. Diagrammatic techniques are given from which selective summations may be performed. A possible candidate for experiments is indicated.Keywords
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