Dynamics of image-potential states on stepped Cu(001) surfaces

Autor:	M. Pickel, M. Roth, Th. Fauster, Martin Weinelt
Rok vydání:	2004
Předmět:	Chemistry Scattering chemistry.chemical_element General Chemistry Quantum number Copper Molecular physics law.invention Crystallography X-ray photoelectron spectroscopy law General Materials Science Angular resolution Boundary value problem Scanning tunneling microscope Electronic band structure
Zdroj:	Applied Physics A: Materials Science & Processing. 78:149-153
ISSN:	1432-0630 0947-8396
DOI:	10.1007/s00339-003-2311-5
Popis:	The dynamical properties of image-potential states on stepped Cu(117) and Cu(118) surfaces were studied by time- and angle-resolved two-photon photoelectron spectroscopy. The interaction with the step-induced potential leads to quasielastic anisotropic scattering between image-potential-state bands. In particular, resonant interband scattering from image-potential states with quantum numbers n≥2 to the n=1 band and quasielastic intraband scattering within the n=1 band show high efficiency. In spite of the higher step density of Cu(117), resonant scattering is about four times larger on Cu(118). This distinction is attributed to the different step distributions of the two surfaces and to the concomitant correlation of the step arrangement on short- and long-range scales, which has been studied by scanning tunneling microscopy. Details of the surface band structure lead to different boundary conditions and may weakly affect scattering probabilities.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7c9a774aad32f10946c74c4ffc8afd48 https://doi.org/10.1007/s00339-003-2311-5 Zobrazit plný text záznamu Plný text ve formátu PDF