Quantum fluctuations in antiferromagnets
Institut für Theoretische Physik C, Technische Hochschule Aachen, 52056 Aachen, Germany
Published online: 15 April 2000
Dynamic properties of antiferromagnets at zero temperature are explored. Going beyond RPA a nonlinear set of coupled equations for dynamic susceptibilities and correlation functions is derived. New results are presented for nondiagonal elements of the dynamic susceptibility tensor, longitudinal fluctuations and their influence on transverse fluctuations.
PACS: 75.10.Jm – Quantized spin models / 75.30.Ds – Spin waves
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000