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Na and K on Al(100) studied by low-energy electron diffraction and high-resolution core-level spectroscopy

Lundgren, E. LU ; Beutler, A. LU ; Nyholm, R. LU ; Andersen, J. N. LU and Heskett, D. (1997) In Surface Science 370(2-3). p.311-323
Abstract

Experimental results for Na and K deposited at 100 K on the A1(100) surface using low-energy electron diffraction and high-resolution core-level spectroscopy are presented. Our results show that from a coverage of 0.20 monolayers (ML), Na condenses into dense islands with a local Na coverage of 0.50 ML. In the case of K, the overlayer condenses into islands at a coverage of 0.18 ML, with a local coverage of 0.30 ML. A compilation of various geometric parameters of the present systems and of alkalis on Al(111) suggests that the condensation of K on Al(100) differs from that of other alkalis on Al systems which undergo condensation into two-dimensional islands. Furthermore, all the island-forming structures display an alkali-alkali... (More)

Experimental results for Na and K deposited at 100 K on the A1(100) surface using low-energy electron diffraction and high-resolution core-level spectroscopy are presented. Our results show that from a coverage of 0.20 monolayers (ML), Na condenses into dense islands with a local Na coverage of 0.50 ML. In the case of K, the overlayer condenses into islands at a coverage of 0.18 ML, with a local coverage of 0.30 ML. A compilation of various geometric parameters of the present systems and of alkalis on Al(111) suggests that the condensation of K on Al(100) differs from that of other alkalis on Al systems which undergo condensation into two-dimensional islands. Furthermore, all the island-forming structures display an alkali-alkali distance which is expanded relative to the nearest-neighbour distance in the respective alkali metal. The reasons for and implications of this are discussed.

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author
organization
publishing date
type
Contribution to journal
publication status
published
keywords
Adatoms, Alkali metals, Aluminum, Low-energy electron diffraction, Low-index single-crystal surfaces, Photoelectron emission, Soft X-ray photoelectron spectroscopy, Surface relaxation and reconstruction
in
Surface Science
volume
370
issue
2-3
pages
13 pages
publisher
Elsevier
external identifiers
  • Scopus:0030784661
ISSN
0039-6028
language
English
LU publication?
yes
id
3b881715-90f2-49f1-be7d-b8942002871c
date added to LUP
2016-04-29 10:49:57
date last changed
2016-07-01 14:23:29
@misc{3b881715-90f2-49f1-be7d-b8942002871c,
  abstract     = {<p>Experimental results for Na and K deposited at 100 K on the A1(100) surface using low-energy electron diffraction and high-resolution core-level spectroscopy are presented. Our results show that from a coverage of 0.20 monolayers (ML), Na condenses into dense islands with a local Na coverage of 0.50 ML. In the case of K, the overlayer condenses into islands at a coverage of 0.18 ML, with a local coverage of 0.30 ML. A compilation of various geometric parameters of the present systems and of alkalis on Al(111) suggests that the condensation of K on Al(100) differs from that of other alkalis on Al systems which undergo condensation into two-dimensional islands. Furthermore, all the island-forming structures display an alkali-alkali distance which is expanded relative to the nearest-neighbour distance in the respective alkali metal. The reasons for and implications of this are discussed.</p>},
  author       = {Lundgren, E. and Beutler, A. and Nyholm, R. and Andersen, J. N. and Heskett, D.},
  issn         = {0039-6028},
  keyword      = {Adatoms,Alkali metals,Aluminum,Low-energy electron diffraction,Low-index single-crystal surfaces,Photoelectron emission,Soft X-ray photoelectron spectroscopy,Surface relaxation and reconstruction},
  language     = {eng},
  month        = {01},
  number       = {2-3},
  pages        = {311--323},
  publisher    = {ARRAY(0x7f6f390)},
  series       = {Surface Science},
  title        = {Na and K on Al(100) studied by low-energy electron diffraction and high-resolution core-level spectroscopy},
  volume       = {370},
  year         = {1997},
}