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Titolo:
INTERFACIAL REACTION BARRIERS DURING THIN-FILM SOLID-STATE REACTIONS - THE CRYSTALLOGRAPHIC ORIGIN OF KINETIC BARRIERS AT THE NIS2 SI(111) INTERFACE/
Autore:
HESSE D; WERNER P; MATTHEIS R; HEYDENREICH J;
Indirizzi:
MAX PLANCK INST MIKROSTRUKTURPHYS,WEINBERG 2 D-06120 HALLE GERMANY INST PHYS HOCHTECHNOL EV D-07743 JENA GERMANY
Titolo Testata:
Applied physics. A, Solids and surfaces
fascicolo: 5, volume: 57, anno: 1993,
pagine: 415 - 425
SICI:
0721-7250(1993)57:5<415:IRBDTS>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
RESOLUTION ELECTRON-MICROSCOPY; ATOMIC-STRUCTURE; NISI2/(111)SI INTERFACE; NISI2-SI(111) INTERFACE; COSI2/SI(111) INTERFACE; NISI2 ISLANDS; CO-SILICIDE; A-TYPE; GROWTH; SI;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
45
Recensione:
Indirizzi per estratti:
Citazione:
D. Hesse et al., "INTERFACIAL REACTION BARRIERS DURING THIN-FILM SOLID-STATE REACTIONS - THE CRYSTALLOGRAPHIC ORIGIN OF KINETIC BARRIERS AT THE NIS2 SI(111) INTERFACE/", Applied physics. A, Solids and surfaces, 57(5), 1993, pp. 415-425

Abstract

Epitaxial NiSi2 islands have been grown on Si(111) substrates by the direct reaction of nickel vapour with the silicon substrate in ultra-high vacuum at 400-degrees-C. Growth kinetics was shown to depend on the orientation of the islands: A-oriented islands grow about ten times faster than B-oriented ones, with the ratio of the advance rates of the main growth fronts even reaching 30. Applying plan-view transmissionelectron microscopy and high-resolution electron microscopy of cross sections, a corresponding difference was found in the structure of theNiSi2/Si(111) growth front: Steps at the B-oriented growth front wereof three or six interplanar (111) spacings in height, whereas at the A-oriented growth front step-like defects of less than one interplanar(111) spacing in height were observed. These observations are explained by an atomic-scale model of the solid-state reaction, which involves the diffusion of nickel to the interfaces and the nucleation and subsequent lateral propagation of interfacial steps. The difference in the reaction kinetics originates from the presence of kinetic reaction barriers at the NiSi2/Si(111) growth fronts, the barrier at the B-frontbeing higher owing to the lower formation rate of steps of triple atomic height than that of steps of lower height at the A-NiSi2/Si(111) growth front.

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Documento generato il 22/09/20 alle ore 20:38:14