@inproceedings{60ecaaefda8445caafe99dbe62c1bece,
title = "Surface phase transition and electronic structure of c(5 root 2 x root 2)R45 degrees-Pb/Cu(100)",
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.",
keywords = "electronic energy, surface phase transition, Pb, photoemission, Cu(100)",
author = "V. Joco and J Martinez-Blanco and P. Segovia and Balasubramanian Thiagarajan and J. Fujii and Michel, {E. G.}",
year = "2006",
doi = "10.1016/j.susc.2005.11.065",
language = "English",
volume = "600",
publisher = "Elsevier",
number = "18",
pages = "3851--3855",
booktitle = "Proceedings of the 23th European Conference on Surface Science (Surface Science)",
address = "United States",
note = "23th European Conference on Surface Science ; Conference date: 04-09-2005 Through 09-09-2005",
}