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Surface phase transition and electronic structure of c(5 root 2 x root 2)R45 degrees-Pb/Cu(100)

Joco, V. ; Martinez-Blanco, J ; Segovia, P. ; Thiagarajan, Balasubramanian LU ; Fujii, J. and Michel, E. G. (2006) 23th European Conference on Surface Science 600(18). p.3851-3855
Abstract
The c(5 root 2 x root 2)R45 degrees-Pb/Cu(100) surface phase is investigated by means of angle resolved ultraviolet photoemission and low energy electron diffraction in the temperature range between 300 and 550 K. We identify and characterize a temperature-induced surface phase transition at 440 K from the room temperature e(5 root 2 x root 2) R45 degrees phase to a (root 2 x root 2)R45 degrees structure with split superstructure spots. The phase transition is fully reversible and takes place before the two-dimensional melting of the structure at 520 K. The electronic structure of the split (root 2 x root 2)R45 degrees phase is characterized by a metallic free-electron like surface band. This surface band is backfolded with c(5 root 2 x... (More)
The c(5 root 2 x root 2)R45 degrees-Pb/Cu(100) surface phase is investigated by means of angle resolved ultraviolet photoemission and low energy electron diffraction in the temperature range between 300 and 550 K. We identify and characterize a temperature-induced surface phase transition at 440 K from the room temperature e(5 root 2 x root 2) R45 degrees phase to a (root 2 x root 2)R45 degrees structure with split superstructure spots. The phase transition is fully reversible and takes place before the two-dimensional melting of the structure at 520 K. The electronic structure of the split (root 2 x root 2)R45 degrees phase is characterized by a metallic free-electron like surface band. This surface band is backfolded with c(5 root 2 x root 2)R45 degrees periodicity phase at room temperature, giving rise to a surface band gap at the Fermi energy. We propose that a gain in electronic energy explains in part the stability of the c(5 root 2 x root 2)R45 degrees phase. (c) 2006 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
; ; ; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
electronic energy, surface phase transition, Pb, photoemission, Cu(100)
host publication
Proceedings of the 23th European Conference on Surface Science (Surface Science)
volume
600
issue
18
pages
3851 - 3855
publisher
Elsevier
conference name
23th European Conference on Surface Science
conference location
Berlin, Germany
conference dates
2005-09-04 - 2005-09-09
external identifiers
  • wos:000241450600067
  • scopus:33748920346
ISSN
0039-6028
DOI
10.1016/j.susc.2005.11.065
language
English
LU publication?
yes
id
60ecaaef-da84-45ca-afe9-9dbe62c1bece (old id 384300)
date added to LUP
2016-04-01 17:10:35
date last changed
2021-02-17 07:27:14
@inproceedings{60ecaaef-da84-45ca-afe9-9dbe62c1bece,
  abstract     = {The c(5 root 2 x root 2)R45 degrees-Pb/Cu(100) surface phase is investigated by means of angle resolved ultraviolet photoemission and low energy electron diffraction in the temperature range between 300 and 550 K. We identify and characterize a temperature-induced surface phase transition at 440 K from the room temperature e(5 root 2 x root 2) R45 degrees phase to a (root 2 x root 2)R45 degrees structure with split superstructure spots. The phase transition is fully reversible and takes place before the two-dimensional melting of the structure at 520 K. The electronic structure of the split (root 2 x root 2)R45 degrees phase is characterized by a metallic free-electron like surface band. This surface band is backfolded with c(5 root 2 x root 2)R45 degrees periodicity phase at room temperature, giving rise to a surface band gap at the Fermi energy. We propose that a gain in electronic energy explains in part the stability of the c(5 root 2 x root 2)R45 degrees phase. (c) 2006 Elsevier B.V. All rights reserved.},
  author       = {Joco, V. and Martinez-Blanco, J and Segovia, P. and Thiagarajan, Balasubramanian and Fujii, J. and Michel, E. G.},
  booktitle    = {Proceedings of the 23th European Conference on Surface Science (Surface Science)},
  issn         = {0039-6028},
  language     = {eng},
  number       = {18},
  pages        = {3851--3855},
  publisher    = {Elsevier},
  title        = {Surface phase transition and electronic structure of c(5 root 2 x root 2)R45 degrees-Pb/Cu(100)},
  url          = {http://dx.doi.org/10.1016/j.susc.2005.11.065},
  doi          = {10.1016/j.susc.2005.11.065},
  volume       = {600},
  year         = {2006},
}