Au and Cu Atoms on NaCl(001): a single-atom based memory device prototype? A. S. Martins, A. T. da Costa, P. Venezuela and R. B. Muniz Eur. Phys. J. B, 78 4 (2010) 543-546 Published online: 21 December 2010 DOI: 10.1140/epjb/e2010-90852-6