Showing papers in "Physical Review in 1994"

Low-energy ion-scattering study of the oxygen-induced reconstructed p(2x1) and c(6x2) surfaces of Cu(110)

Abstract: The oxygen-induced Cu(110)-p(2\\ifmmode\\times\\else\\texttimes\\fi{}1)O and Cu(110)-c(6\\ifmmode\\times\\else\\texttimes\\fi{}2)O surfaces were studied by means of low-energy ion scattering combined with time of flight. The surfaces were bombarded with 6-keV Ar ions and azimuthal scans for recoiled O and Cu were compared with Monte Carlo computer simulations. The ``added row'' model for the p(2\\ifmmode\\times\\else\\texttimes\\fi{}1) structure is confirmed in this work. The oxygen atoms were found to be located in the [100] bridge position, 0.05\\ifmmode\\pm\\else\\textpm\\fi{}0.06 \\AA{} below the Cu atoms. The recently proposed structure for the c(6\\ifmmode\\times\\else\\texttimes\\fi{}2) surface was confirmed by our data and information about the z positions of the O and Cu atoms was obtained. The topmost ``superstructure'' Cu and O atoms are located 0.45\\ifmmode\\pm\\else\\textpm\\fi{}0.12 \\AA{} and 0.40\\ifmmode\\pm\\else\\textpm\\fi{}0.12 \\AA{} above the underlying Cu layer, respectively. The remaining O atoms are located in the [100] bridge positions 0.12\\ifmmode\\pm\\else\\textpm\\fi{}0.12 \\AA{} below the Cu atoms.

Thermal Decomposition of Fullerene Mix

Abstract: Experiments to determine the cause of fullerene decomposition at temperatures above 973k were conducted by spectroscopic analysis of samples heated in vacuo.