Highly dispersive spin excitations in the chain cuprate Li2CuO2 W. E. A. Lorenz, R. O. Kuzian, S.-L. Drechsler, W.-D. Stein, N. Wizent, G. Behr, J. Málek, U. Nitzsche, H. Rosner, A. Hiess et al. (4 more) EPL, 88 3 (2009) 37002 Published online: 12 November 2009 DOI: 10.1209/0295-5075/88/37002