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Titolo:
Periodic structures induced by normal-incidence sputtering on Ag(110) and Ag(001): flux and temperature dependence
Autore:
Costantini, G; Rusponi, S; de Mongeot, FB; Boragno, C; Valbusa, U;
Indirizzi:
CNR, INFM, Unita Ricerca Genova, Ctr CFSBT, I-16146 Genoa, Italy CNR Genoa Italy I-16146 Ricerca Genova, Ctr CFSBT, I-16146 Genoa, Italy Dipartimento Fis, I-16146 Genoa, Italy Dipartimento Fis Genoa Italy I-16146 artimento Fis, I-16146 Genoa, Italy
Titolo Testata:
JOURNAL OF PHYSICS-CONDENSED MATTER
fascicolo: 26, volume: 13, anno: 2001,
pagine: 5875 - 5891
SICI:
0953-8984(20010702)13:26<5875:PSIBNS>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
SCANNING-TUNNELING-MICROSCOPY; MOLECULAR-BEAM EPITAXY; ION-BOMBARDED SI; ROUGHENING INSTABILITY; RIPPLE TOPOGRAPHY; SURFACE-DIFFUSION; GROWTH; MORPHOLOGY; NANOSTRUCTURES; HOMOEPITAXY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Costantini, G Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany Max Planck Inst Festkorperforsch Heisenbergstr 1 Stuttgart Germany D-70569
Citazione:
G. Costantini et al., "Periodic structures induced by normal-incidence sputtering on Ag(110) and Ag(001): flux and temperature dependence", J PHYS-COND, 13(26), 2001, pp. 5875-5891

Abstract

The morphology generated on Ag(110) and Ag(001) by 1 keV Ar+ sputtering atnormal incidence has been studied by scanning tunnelling microscopy as a function of the substrate temperature T-S and the ion flux Phi. Since ion sputtering is a non-equilibrium process in which erosion competes with diffusion in determining the surface evolution, these macroscopic parameters can be used to tune the final surface morphology. Flat or rough surfaces as well as periodic structures have been observed on both substrates. On Ag(110),ion sputtering at 230 K and 320 K produces two well defined ripple patterns whose wave vectors are parallel to <1 (1) over bar0 > and < 001 > respectively, while on Ag(001) a periodic pattern of square islands has been observed over a wide range of substrate temperatures (240 K less than or equal to T-S < 440 K), Similar to the results reported in growth experiments, a flux increase produces a surface evolution qualitatively comparable with thatobtained by lowering the temperature. The results are discussed in terms of a continuum model for the ion sputtering process.

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Documento generato il 03/12/20 alle ore 05:50:21