Spin-waves in the mid-infrared spectrum of antiferromagnetic YBa2Cu3O6.0 M. Grüninger, J. Münzel, A. Gaymann, A. Zibold, H. P. Geserich and T. Kopp Europhys. Lett., 35 1 (1996) 55-60 Published online: 01 September 2002 DOI: 10.1209/epl/i1996-00530-3