INVESTIGADORES
ALDAO celso Manuel
artículos
Título:
Exchange Reaction, Clustering and Surface Segregation at the Al/InSb(110) Interface
Autor/es:
F. BOSCHERINI; Y. SHAPIRA; C. CAPASSO; C.M. ALDAO; M. DEL GIUDICE; J.H. WEAVER
Revista:
PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS
Editorial:
APS
Referencias:
Año: 1987 vol. 35 p. 9580 - 9585
ISSN:
0163-1829
Resumen:
High-resolution photoemission studies of the Al 2p, In 4d, and Sb 4d core levels for the
A1/InSb(110) interface have been performed. Detailed core-level line-shape analysis makes it possible
to follow the growth and attenuation of each of the reacted species and to model the evolving
morphology of the interface. These results show the onset of heterogeneous reaction at room temperature by a nominal coverage of 0.06 A. By 3-A nominal coverage, clusters of metallic Al have
formed over the reacted region, indicating the self-limiting, localized character of the Al/InSb reaction,
while lateral growth of the reacted region continues. With increasing coverage, the Al islands
grow and small metallic clusters of In appear on the surface. At a nominal coverage of -20 A, the
reaction across the surface is complete, and the deposition of additional Al results in the growth of
the large, sparsely distributed Al islands which do little to attenuate the substrate signal.