X-RAY-SCATTERING DETERMINATION OF THE CU(110)-(2X3)N STRUCTURE

被引:29
作者
BADDORF, AP
ZEHNER, DM
HELGESEN, G
GIBBS, D
SANDY, AR
MOCHRIE, SGJ
机构
[1] BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973
[2] MIT,DEPT PHYS,CAMBRIDGE,MA 02139
来源
PHYSICAL REVIEW B | 1993年 / 48卷 / 12期
关键词
D O I
10.1103/PhysRevB.48.9013
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The structure of Cu(110)-(2X3)N has been investigated with x-ray reflectivity measurements of nine independent surface rods. Observed reflectivities ranging over five orders of magnitude were compared with calculations based on structural models. A pseudo-(100) reconstruction consisting of four [110BAR] copper rows in the outermost layer for every three of the bulk is favored both by symmetry and by an R-factor analysis. An excellent fit, with an R factor of 0.0051, is obtained for this model by including a large expansion of the interlayer spacing (57% greater than bulk) and large corrugation amplitude (50%, of the bulk interlayer spacing) in the outermost layer. These values can be understood by considering a hard-sphere model of the surface structure. The corrugation results in two raised and two lowered rows of copper atoms in the outermost layer and extends to several layers into the substrate (amplitudes from 9% to 22% of the bulk interlayer spacing). Vibrational amplitudes in the reconstructed layer are anisotropically enhanced by a factor of 2.8 normal to the surface and by 1.3 within the surface plane over bulk values. Nitrogen atoms are located 0.75 angstrom above the copper layer, and form a nearly (square-root 2 X square-root 2) R 45-degrees structure with respect to the reconstructed copper. This model is shown to be consistent with most previous experimental observations.
引用
收藏
页码:9013 / 9020
页数:8
相关论文
共 26 条
  • [11] NITROGEN-INDUCED RECONSTRUCTION OF CU(110) - FORMATION OF A SURFACE NITRIDE
    HESKETT, D
    BADDORF, A
    PLUMMER, EW
    [J]. SURFACE SCIENCE, 1988, 195 (1-2) : 94 - 102
  • [12] FORMATION OF A SURFACE NITRIDE ON COPPER(111) AND ITS INFLUENCE ON CARBON-MONOXIDE ADSORPTION - INVESTIGATION BY LEED, RAIRS AND EELS
    HIGGS, V
    HOLLINS, P
    PEMBLE, ME
    PRITCHARD, J
    [J]. JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 1986, 39 (1-4) : 137 - 144
  • [13] Crystal structures of Cu3N, GaN and InN - Metallic amides and metallic nitrides V Announcement
    Juza, R
    Hahn, H
    [J]. ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1938, 239 (03): : 282 - 287
  • [14] FACETING OF CU(210) AND NI(210) BY ACTIVATED NITROGEN
    KIRBY, RE
    MCKEE, CS
    RENNY, LV
    [J]. SURFACE SCIENCE, 1980, 97 (2-3) : 457 - 477
  • [15] LEED STUDIES OF ADSORPTION ON CLEAN (100) COPPER SURFACES
    LEE, RN
    FARNSWOR.HE
    [J]. SURFACE SCIENCE, 1965, 3 (05) : 461 - &
  • [16] MOCHRIE SGJ, 1988, J APPL CRYSTALLOGR, V20, P1
  • [17] MOHAMED MH, 1987, SURF SCI, V185, pL467, DOI 10.1016/S0039-6028(87)80602-7
  • [18] N-INDUCED (2X3) RECONSTRUCTION OF CU(110) - EVIDENCE FOR LONG-RANGE, HIGHLY DIRECTIONAL INTERACTION BETWEEN CU-N-CU BONDS
    NIEHUS, H
    SPITZL, R
    BESOCKE, K
    COMSA, G
    [J]. PHYSICAL REVIEW B, 1991, 43 (15): : 12619 - 12622
  • [19] STRUCTURE AND PHASES OF THE AU(001) SURFACE - ABSOLUTE X-RAY REFLECTIVITY
    OCKO, BM
    GIBBS, D
    HUANG, KG
    ZEHNER, DM
    MOCHRIE, SGJ
    [J]. PHYSICAL REVIEW B, 1991, 44 (12): : 6429 - 6443
  • [20] PHOTOELECTRON DIFFRACTION STUDY OF THE LOCAL ADSORPTION SITE IN THE CU(110)(2X3)-N STRUCTURE
    ROBINSON, AW
    WOODRUFF, DP
    SOMERS, JS
    KILCOYNE, ALD
    RICKEN, DE
    BRADSHAW, AM
    [J]. SURFACE SCIENCE, 1990, 237 (1-3) : 99 - 107