Surface structure of liquid Bi and Sn: An x-ray reflectivity study

P. S. Pershan,1 S. E. Stoltz,1 Oleg G. Shpyrko,2 Moshe Deutsch,3 Venkatachalapathy S. K. Balagurusamy,1 Mati Meron,4 Binhua Lin,4 and Reinhard Streitel1 1Department of Physics and SEAS, Harvard University, Cambridge, Massachusetts 02138, USA 2Department of Physics, University of California–San Diego, San Diego, La Jolla, California 92093, USA 3Department of Physics and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 52900, Israel 4CARS, University of Chicago, Chicago, Illinois 60637, USA Received 10 November 2008; revised manuscript received 12 January 2009; published 13 March 2009