GEOMETRY OF THE GE(111)-AU(ROOT-3X-ROOT-3)R 30-DEGREES RECONSTRUCTION

被引:21
作者
GOTHELID, M
HAMMAR, M
BJORKQVIST, M
KARLSSON, UO
FLODSTROM, SA
WIGREN, C
LELAY, G
机构
[1] STANFORD LINEAR ACCELERATOR CTR,STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94309
[2] CNRS,CTR RECH MECANISMES CROISSANCE CRISTALLINE,F-13288 MARSEILLE 09,FRANCE
来源
PHYSICAL REVIEW B | 1994年 / 50卷 / 07期
关键词
D O I
10.1103/PhysRevB.50.4470
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A structure model for the Ge(111)-Au(root 3X root 3)R30 degrees surface reconstruction is proposed based on scanning tunneling microscopy (STM) and photoelectron spectroscopy on the Ge 3d and Au 4f core lines. The basic unit is a Au3Ge molecule binding in one-third of the T-1 substrate sites with a gold trimer pointing out of the surface. This leaves two-thirds of a monolayer of unoccupied T-1 sites which make up a hexagonal honeycomb pattern. Two types of STM images have been obtained which are explained within this model, where either the trimers or the substrate Ge atoms are probed depending on the specific tip conditions in combination with the sample bias voltage. Furthermore, small insets of a metallic (1X1) structure are found at low gold coverage together with a distorted (2X2) surface structure.
引用
收藏
页码:4470 / 4475
页数:6
相关论文
共 17 条
  • [1] ANDERSEN JN, 1991, SYNCHROTRON RAD NEWS, V4, P15
  • [2] CORE-LEVEL BINDING-ENERGY SHIFTS, THERMODYNAMIC PREDICTIONS, AND MORPHOLOGIES FOR METAL-SI AND METAL-GE INTERFACES
    DELGIUDICE, M
    JOYCE, JJ
    WEAVER, JH
    [J]. PHYSICAL REVIEW B, 1987, 36 (09): : 4761 - 4768
  • [3] THEORETICAL INVESTIGATION OF THE STRUCTURE OF THE (ROOT-3X-ROOT-3R30-DEGREES-AU/SI(111) SURFACE
    DING, YG
    CHAN, CT
    HO, KM
    [J]. SURFACE SCIENCE, 1992, 275 (03) : L691 - L696
  • [4] AG ON GE(111) - 2D X-RAY STRUCTURE-ANALYSIS OF THE ROOT-3X-ROOT-3 SUPERSTRUCTURE
    DORNISCH, D
    MORITZ, W
    SCHULZ, H
    FEIDENHANSL, R
    NIELSEN, M
    GREY, F
    JOHNSON, RL
    LELAY, G
    [J]. SURFACE SCIENCE, 1992, 274 (02) : 215 - 221
  • [5] ADATOM AND REST-ATOM CONTRIBUTIONS IN GE(111)C(2X8) AND GE(111)-SN(7X7) CORE-LEVEL SPECTRA
    GOTHELID, M
    GREHK, TM
    HAMMAR, M
    KARLSSON, UO
    FLODSTROM, SA
    [J]. PHYSICAL REVIEW B, 1993, 48 (03): : 2012 - 2015
  • [6] INITIAL GROWTH OF SILVER ON GE(111) STUDIED BY SCANNING-TUNNELING-MICROSCOPY
    HAMMAR, M
    GOTHELID, M
    KARLSSON, UO
    FLODSTROM, SA
    [J]. PHYSICAL REVIEW B, 1993, 47 (23): : 15669 - 15674
  • [7] STRUCTURE OF GE(111)ROOT-3X-ROOT-3R30-DEGREES-AU DETERMINED BY SURFACE X-RAY-DIFFRACTION
    HOWES, PB
    NORRIS, C
    FINNEY, MS
    VLIEG, E
    VANSILFHOUT, RG
    [J]. PHYSICAL REVIEW B, 1993, 48 (03): : 1632 - 1642
  • [8] THE 1ST STAGES OF THE AU/GE(111) INTERFACE FORMATION
    LELAY, G
    MANNEVILLE, M
    METOIS, JJ
    [J]. SURFACE SCIENCE, 1982, 123 (01) : 117 - 128
  • [9] SQUARE-ROOT-3XSQUARE-ROOT-3-]6X6 PHASE-TRANSITION ON THE AU/SI(111) SURFACE
    NOGAMI, J
    BASKI, AA
    QUATE, CF
    [J]. PHYSICAL REVIEW LETTERS, 1990, 65 (13) : 1611 - 1614
  • [10] VALENCE BAND AND CORE LINES INVESTIGATION ON THE GE-AU SYSTEM BY PHOTO-ELECTRON SPECTROSCOPY WITH SYNCHROTRON RADIATION
    PERFETTI, P
    KATNANI, AD
    ZHAO, TX
    MARGARITONDO, G
    BISI, O
    CALANDRA, C
    [J]. JOURNAL OF VACUUM SCIENCE & TECHNOLOGY, 1982, 21 (02): : 628 - 631