Leaky atomic traps : upward diffusion of Au from nanoscale pits on ionic-crystal surfaces

M. Goryl,1 F. Buatier de Mongeot,2 F. Krok,1 A. Vevecka-Priftaj,3 and M. Szymonski1,* 1Center for Nanometer-Scale Science and Advanced Materials (NANOSAM), Faculty of Physics, Astronomy, and Applied Computer Science, Jagiellonian University, ulica Reymonta 4, 30-059 Krakow, Poland 2Dipartimento di Fisica, Universita di Genova, Via Dodecaneso 33, 16146 Genova, Italy 3Department of Physics, Polytechnic University of Tirana, Sheshi “Nene Tereza,” No. 4, Tirana, Albania Received 8 March 2007; revised manuscript received 21 May 2007; published 17 August 2007