Low-temperature excitations in random two-dimensional antiferromagnets
- 14 July 1976
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 9 (13) , 2555-2568
- https://doi.org/10.1088/0022-3719/9/13/015
Abstract
A numerical method involving the time integration of equations of motion is developed for calculating response functions of antiferromagnets. The method is particularly useful in calculating dynamic response functions S(k, omega ) and can also be used to obtain densities of states. The technique is applied to the two-dimensional random antiferromagnets Rb2Mn0.5Ni0.5F4 and Rb2MncZn1-cF4. In the former case, good agreement is found with the recently measured S(k, omega ) and in the latter some interesting clustering effects that should be accessible experimentally are found.Keywords
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