Surfactant-mediated growth of indium on GaAs(001)

Schintke, Silvia (Technische Universität Berlin, Berlin, Germany) ; Resch-Esser, U. (Technische Universität Berlin, Berlin, Germany) ; Esser, N. (Technische Universität Berlin, Berlin, Germany) ; Krost, A. (Technische Universität Berlin, Berlin, Germany) ; Richter, W. (Technische Universität Berlin, Berlin, Germany) ; Fimland, B. O. (NTNU Trondheim, Trondheim, Norway)

The influence of antimony as surfactant on the growth mode of indium on GaAs(001) has been investigated for deposition at various temperatures. Clean surfaces of (2 × 4) reconstruction were prepared in UHV by thermal desorption of a protective arsenic cap deposited on top of homoepitaxially grown MBE layers. Before In deposition, 2 ML Sb were pre-deposited on top of the clean GaAs surface of part of the samples. The In growth mode was then monitored by AES and compared with that occurring during In growth on GaAs without an Sb interlayer. After removal of the samples from UHV, SEM investigations show regularly shaped, flat In islands oriented along the 〈110〉 substrate directions. In comparison, In islands grown without an Sb interlayer also show a preferential orientation along the 〈110〉 substrate directions, but differ in shape and size. Low-temperature In deposition (120 K) leads to the formation of a continuous In layer, which tears during warm up to room temperature. An exchange between surfactant material and indium during growth is found for both low- and room-temperature In deposition. X-ray diffraction measurements show a strong influence of the Sb surfactant on the crystallinity of the In film.


Note: SCHINTKE, Silvia est une chercheuse à la HES-SO, HEIG-VD, depuis 2002.


Mots-clés:
Type d'article:
scientifique
Faculté:
Ingénierie et Architecture
Ecole:
HEIG-VD
Institut:
COMATEC - Institut de Conception, Matériaux, Emballage & Conditionnement
Date:
1997-04
Pagination:
5 p.
Publié dans:
Surface Science
Numérotation (vol. no.):
1997, vol. 377-379, pp. 953-957
DOI:
ISSN:
0039-6028
Le document apparaît dans:

Note: The status of this file is: restricted


 Notice créée le 2021-02-12, modifiée le 2021-02-19

Fulltext:
Télécharger le document
PDF

Évaluer ce document:

Rate this document:
1
2
3
 
(Pas encore évalué)