Anomalous surface segregation of Sb in Si during epitaxial growth

K. Kimura, Y. Endoh, M. Mannami, H. J. Gossmann, G. H. Gilmer, Leonard C Feldman

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A delta-function-shaped Sb doping spike in Si is prepared by deposition of Sb on Si(001) followed by low-temperature molecular beam epitaxy of Si. The depth profile of the Sb atoms is measured using high-resolution Rutherford backscattering spectroscopy, yielding a depth resolution of 0.3 nm. The observed profile shows two peaks corresponding to the δ-doped layer (of width 0.5 nm) and Sb atoms on the surface. The latter are due to surface segregation of Sb atoms during the growth of the Si cap layer. The surface segregation rate is derived from the observed results at temperatures 70-280°C. It is larger than the value extrapolated from high-temperature (>400°C) data by several orders of magnitude and shows a very weak temperature dependence as compared to the high-temperature data. These features indicate a new surface segregation mechanism at low temperature. A mechanism for this anomalous segregation is discussed.

Original languageEnglish
Pages (from-to)67-69
Number of pages3
JournalApplied Physics Letters
Volume69
Issue number1
Publication statusPublished - Jul 1 1996

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atoms
delta function
profiles
spikes
caps
backscattering
molecular beam epitaxy
temperature dependence
high resolution
spectroscopy
temperature

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Kimura, K., Endoh, Y., Mannami, M., Gossmann, H. J., Gilmer, G. H., & Feldman, L. C. (1996). Anomalous surface segregation of Sb in Si during epitaxial growth. Applied Physics Letters, 69(1), 67-69.

Anomalous surface segregation of Sb in Si during epitaxial growth. / Kimura, K.; Endoh, Y.; Mannami, M.; Gossmann, H. J.; Gilmer, G. H.; Feldman, Leonard C.

In: Applied Physics Letters, Vol. 69, No. 1, 01.07.1996, p. 67-69.

Research output: Contribution to journalArticle

Kimura, K, Endoh, Y, Mannami, M, Gossmann, HJ, Gilmer, GH & Feldman, LC 1996, 'Anomalous surface segregation of Sb in Si during epitaxial growth', Applied Physics Letters, vol. 69, no. 1, pp. 67-69.
Kimura K, Endoh Y, Mannami M, Gossmann HJ, Gilmer GH, Feldman LC. Anomalous surface segregation of Sb in Si during epitaxial growth. Applied Physics Letters. 1996 Jul 1;69(1):67-69.
Kimura, K. ; Endoh, Y. ; Mannami, M. ; Gossmann, H. J. ; Gilmer, G. H. ; Feldman, Leonard C. / Anomalous surface segregation of Sb in Si during epitaxial growth. In: Applied Physics Letters. 1996 ; Vol. 69, No. 1. pp. 67-69.
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