Correlation Theory of Planar Magnets for
- 28 February 1983
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 50 (9) , 690-693
- https://doi.org/10.1103/physrevlett.50.690
Abstract
A self-consistent theory for static and dynamic properties of planar magnets including quantum and correlation effects is presented. The renormalization and damping of the potentially soft mode is calculated. A central peak absorbing the spectral weight near the transition temperature is found. Qualitative agreement is obtained with observations made on Pr, which approximately represents a singlet-doublet model. The correlation theory is a systematic generalization of the random-phase approximation with an equally wide range of applicability.Keywords
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