LEED study of the potassium-induced reconstruction of Cu(110)

Autor:	Katharina J. Franke, Renee D. Diehl, Nicola Ferralis, M. Caragiu
Rok vydání:	2001
Předmět:	Crystallography Adsorption chemistry Electron diffraction Transition metal Potassium Atom chemistry.chemical_element General Materials Science Condensed Matter Physics Copper Surface reconstruction Overlayer
Zdroj:	Journal of Physics: Condensed Matter. 13:3961-3967
ISSN:	1361-648X 0953-8984
DOI:	10.1088/0953-8984/13/18/306
Popis:	We have used low-energy electron diffraction (LEED) to determine the adsorption geometry of the ordered p(2×2) potassium overlayer on the (potassium-induced) (1×2) missing-row reconstruction of Cu(110) at 47 K. The K adsorption site in this ordered structure is substitutional, whereby the K atoms occupy half of the Cu sites which are vacated in the missing-row reconstruction. The distance between the K atom and its nearest neighbours (in the second Cu layer) is 3.24±0.05 A. We observed very little, if any, lateral displacement of the second-layer Cu atoms, but a significant buckling in the third layer. The effect of this buckling is to pull the rows of third-layer Cu atoms which are directly beneath the K rows toward the surface, thus increasing the effective coordination of the K atoms.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2a576eb4e470f7ddc2f7934f9fe00e6a https://doi.org/10.1088/0953-8984/13/18/306 Zobrazit plný text záznamu