AN ADSORBATE-STABILIZED VACANCY STRUCTURE FOR CU ON W(100) - A SURFACE ALLOY

P HU*, A WANDER, LM DELAGARZA, MP BESSENT, DA KING

*Corresponding author for this work

Research output: Contribution to journalLetter

Abstract

Deposition of 0.5 ML of Cu on W(100) leads to the formation of a sharp c(2 x 2) structure when the surface is annealed at 800 K. A LEED intensity analysis reveals that the Cu atoms are adsorbed displacively into W sites, forming an ordered 2D surface alloy. Due to the lattice mismatch between copper and tungsten, a substantial buckling of the first layer of the alloy is also observed. The clean, bulk terminated W(100) surface is only just stable relative to the c(2 x 2) vacancy covered W(100) surface. This relative stability of the vacancy structure explains the driving force behind the formation of this alloy.

Original languageEnglish
Pages (from-to)L542-L546
Number of pages5
JournalSurface Science
Volume286
Issue number1-2
Publication statusPublished - 20 Apr 1993

Keywords

  • ENERGY-ELECTRON DIFFRACTION
  • RECONSTRUCTION
  • LEED
  • CONDENSATION
  • TRANSITION
  • MO(100)
  • COPPER
  • SILVER
  • GOLD
  • AU

Cite this

HU, P., WANDER, A., DELAGARZA, LM., BESSENT, MP., & KING, DA. (1993). AN ADSORBATE-STABILIZED VACANCY STRUCTURE FOR CU ON W(100) - A SURFACE ALLOY. Surface Science, 286(1-2), L542-L546.
HU, P ; WANDER, A ; DELAGARZA, LM ; BESSENT, MP ; KING, DA. / AN ADSORBATE-STABILIZED VACANCY STRUCTURE FOR CU ON W(100) - A SURFACE ALLOY. In: Surface Science. 1993 ; Vol. 286, No. 1-2. pp. L542-L546.
@article{54aa11a4070c4eaaa6955dc9169e527e,
title = "AN ADSORBATE-STABILIZED VACANCY STRUCTURE FOR CU ON W(100) - A SURFACE ALLOY",
abstract = "Deposition of 0.5 ML of Cu on W(100) leads to the formation of a sharp c(2 x 2) structure when the surface is annealed at 800 K. A LEED intensity analysis reveals that the Cu atoms are adsorbed displacively into W sites, forming an ordered 2D surface alloy. Due to the lattice mismatch between copper and tungsten, a substantial buckling of the first layer of the alloy is also observed. The clean, bulk terminated W(100) surface is only just stable relative to the c(2 x 2) vacancy covered W(100) surface. This relative stability of the vacancy structure explains the driving force behind the formation of this alloy.",
keywords = "ENERGY-ELECTRON DIFFRACTION, RECONSTRUCTION, LEED, CONDENSATION, TRANSITION, MO(100), COPPER, SILVER, GOLD, AU",
author = "P HU and A WANDER and LM DELAGARZA and MP BESSENT and DA KING",
year = "1993",
month = "4",
day = "20",
language = "English",
volume = "286",
pages = "L542--L546",
journal = "Surface Science",
issn = "0039-6028",
publisher = "Elsevier",
number = "1-2",

}

HU, P, WANDER, A, DELAGARZA, LM, BESSENT, MP & KING, DA 1993, 'AN ADSORBATE-STABILIZED VACANCY STRUCTURE FOR CU ON W(100) - A SURFACE ALLOY', Surface Science, vol. 286, no. 1-2, pp. L542-L546.

AN ADSORBATE-STABILIZED VACANCY STRUCTURE FOR CU ON W(100) - A SURFACE ALLOY. / HU, P; WANDER, A; DELAGARZA, LM; BESSENT, MP; KING, DA.

In: Surface Science, Vol. 286, No. 1-2, 20.04.1993, p. L542-L546.

Research output: Contribution to journalLetter

TY - JOUR

T1 - AN ADSORBATE-STABILIZED VACANCY STRUCTURE FOR CU ON W(100) - A SURFACE ALLOY

AU - HU, P

AU - WANDER, A

AU - DELAGARZA, LM

AU - BESSENT, MP

AU - KING, DA

PY - 1993/4/20

Y1 - 1993/4/20

N2 - Deposition of 0.5 ML of Cu on W(100) leads to the formation of a sharp c(2 x 2) structure when the surface is annealed at 800 K. A LEED intensity analysis reveals that the Cu atoms are adsorbed displacively into W sites, forming an ordered 2D surface alloy. Due to the lattice mismatch between copper and tungsten, a substantial buckling of the first layer of the alloy is also observed. The clean, bulk terminated W(100) surface is only just stable relative to the c(2 x 2) vacancy covered W(100) surface. This relative stability of the vacancy structure explains the driving force behind the formation of this alloy.

AB - Deposition of 0.5 ML of Cu on W(100) leads to the formation of a sharp c(2 x 2) structure when the surface is annealed at 800 K. A LEED intensity analysis reveals that the Cu atoms are adsorbed displacively into W sites, forming an ordered 2D surface alloy. Due to the lattice mismatch between copper and tungsten, a substantial buckling of the first layer of the alloy is also observed. The clean, bulk terminated W(100) surface is only just stable relative to the c(2 x 2) vacancy covered W(100) surface. This relative stability of the vacancy structure explains the driving force behind the formation of this alloy.

KW - ENERGY-ELECTRON DIFFRACTION

KW - RECONSTRUCTION

KW - LEED

KW - CONDENSATION

KW - TRANSITION

KW - MO(100)

KW - COPPER

KW - SILVER

KW - GOLD

KW - AU

M3 - Letter

VL - 286

SP - L542-L546

JO - Surface Science

JF - Surface Science

SN - 0039-6028

IS - 1-2

ER -

HU P, WANDER A, DELAGARZA LM, BESSENT MP, KING DA. AN ADSORBATE-STABILIZED VACANCY STRUCTURE FOR CU ON W(100) - A SURFACE ALLOY. Surface Science. 1993 Apr 20;286(1-2):L542-L546.