Acoustic phonons of the Ge(111) surface above 1000 K A. L. Glebov, J. P. Toennies, S. Vollmer and G. Benedek Europhys. Lett., 46 3 (1999) 369-375 Published online: 01 September 2002 DOI: 10.1209/epl/i1999-00271-3