Eur. Phys. J. B 14, 515-521 (2000)
https://doi.org/10.1007/s100510051060

Quantum fluctuations in antiferromagnets

Institut für Theoretische Physik C, Technische Hochschule Aachen, 52056 Aachen, Germany

Received: 13 August 1999
Published online: 15 April 2000

Abstract

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.