X-ray standing wave study of the Sr/Si(0 0 1)-(2 × 3) surface

D. M. Goodner; D. L. Marasco; A. A. Escuadro; L. Cao; B. P. Tinkham; M. J. Bedzyk

doi:10.1016/j.susc.2003.09.031

X-ray standing wave study of the Sr/Si(0 0 1)-(2 × 3) surface

D. M. Goodner, D. L. Marasco, A. A. Escuadro, L. Cao, B. P. Tinkham, M. J. Bedzyk^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

Sub-monolayer surface phases of Sr on Si(0 0 1) have been studied with low-energy electron diffraction (LEED) and X-ray standing waves (XSW). A (3 × 1) phase was observed after depositing 0.6-0.8 ML Sr on room-temperature Si(0 0 1). Annealing at 750-800 °C caused a portion of the Sr to desorb and resulted in a sharp (2 × 3) LEED pattern. Normal Si(0 0 4) and off-normal Si(0 2 2) and Si(1 1 1) XSW measurements made on the (2 × 3) phase indicate that Sr atoms must sit at either cave or bridge sites. The XSW results also suggest that if a sufficiently low anneal temperature is used, the (2 × 3) phase co-exists with short-range ordered regions of Sr atoms located at valley-bridge sites.

Original language	English (US)
Pages (from-to)	19-26
Number of pages	8
Journal	Surface Science
Volume	547
Issue number	1-2
DOIs	https://doi.org/10.1016/j.susc.2003.09.031
State	Published - Dec 10 2003
Externally published	Yes

Funding

The authors gratefully acknowledge the BESSRC-CAT staff and O. Auciello of MSD/ANL for assistance with XSW experiments along with L. Funk and P. Baldo of MSD/ANL for providing the RBS calibrated Sr-implanted standard used for coverage determination. We also thank R.A. McKee and F.J. Walker for valuable advice. This work was supported by NSF under contract nos. DMR-9973436, DMR-0076097 and CHE-9810378 and by the DOE-BES under contract no. W-31-109-Eng-38 to ANL and DE-FG02-03ER15457 to NU.

Keywords

Alkaline earth metals
Low energy electron diffraction (LEED)
Low index single crystal surfaces
Molecular beam epitaxy
Silicon
Surface structure, morphology, roughness, and topography
X-ray standing waves

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.susc.2003.09.031

Cite this

@article{065c591a2bb94c8585ffb226bee277b7,

title = "X-ray standing wave study of the Sr/Si(0 0 1)-(2 × 3) surface",

abstract = "Sub-monolayer surface phases of Sr on Si(0 0 1) have been studied with low-energy electron diffraction (LEED) and X-ray standing waves (XSW). A (3 × 1) phase was observed after depositing 0.6-0.8 ML Sr on room-temperature Si(0 0 1). Annealing at 750-800 °C caused a portion of the Sr to desorb and resulted in a sharp (2 × 3) LEED pattern. Normal Si(0 0 4) and off-normal Si(0 2 2) and Si(1 1 1) XSW measurements made on the (2 × 3) phase indicate that Sr atoms must sit at either cave or bridge sites. The XSW results also suggest that if a sufficiently low anneal temperature is used, the (2 × 3) phase co-exists with short-range ordered regions of Sr atoms located at valley-bridge sites.",

keywords = "Alkaline earth metals, Low energy electron diffraction (LEED), Low index single crystal surfaces, Molecular beam epitaxy, Silicon, Surface structure, morphology, roughness, and topography, X-ray standing waves",

author = "Goodner, {D. M.} and Marasco, {D. L.} and Escuadro, {A. A.} and L. Cao and Tinkham, {B. P.} and Bedzyk, {M. J.}",

note = "Funding Information: The authors gratefully acknowledge the BESSRC-CAT staff and O. Auciello of MSD/ANL for assistance with XSW experiments along with L. Funk and P. Baldo of MSD/ANL for providing the RBS calibrated Sr-implanted standard used for coverage determination. We also thank R.A. McKee and F.J. Walker for valuable advice. This work was supported by NSF under contract nos. DMR-9973436, DMR-0076097 and CHE-9810378 and by the DOE-BES under contract no. W-31-109-Eng-38 to ANL and DE-FG02-03ER15457 to NU. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

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AU - Goodner, D. M.

AU - Marasco, D. L.

AU - Escuadro, A. A.

AU - Cao, L.

AU - Tinkham, B. P.

AU - Bedzyk, M. J.

N1 - Funding Information: The authors gratefully acknowledge the BESSRC-CAT staff and O. Auciello of MSD/ANL for assistance with XSW experiments along with L. Funk and P. Baldo of MSD/ANL for providing the RBS calibrated Sr-implanted standard used for coverage determination. We also thank R.A. McKee and F.J. Walker for valuable advice. This work was supported by NSF under contract nos. DMR-9973436, DMR-0076097 and CHE-9810378 and by the DOE-BES under contract no. W-31-109-Eng-38 to ANL and DE-FG02-03ER15457 to NU. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2003/12/10

Y1 - 2003/12/10

N2 - Sub-monolayer surface phases of Sr on Si(0 0 1) have been studied with low-energy electron diffraction (LEED) and X-ray standing waves (XSW). A (3 × 1) phase was observed after depositing 0.6-0.8 ML Sr on room-temperature Si(0 0 1). Annealing at 750-800 °C caused a portion of the Sr to desorb and resulted in a sharp (2 × 3) LEED pattern. Normal Si(0 0 4) and off-normal Si(0 2 2) and Si(1 1 1) XSW measurements made on the (2 × 3) phase indicate that Sr atoms must sit at either cave or bridge sites. The XSW results also suggest that if a sufficiently low anneal temperature is used, the (2 × 3) phase co-exists with short-range ordered regions of Sr atoms located at valley-bridge sites.

AB - Sub-monolayer surface phases of Sr on Si(0 0 1) have been studied with low-energy electron diffraction (LEED) and X-ray standing waves (XSW). A (3 × 1) phase was observed after depositing 0.6-0.8 ML Sr on room-temperature Si(0 0 1). Annealing at 750-800 °C caused a portion of the Sr to desorb and resulted in a sharp (2 × 3) LEED pattern. Normal Si(0 0 4) and off-normal Si(0 2 2) and Si(1 1 1) XSW measurements made on the (2 × 3) phase indicate that Sr atoms must sit at either cave or bridge sites. The XSW results also suggest that if a sufficiently low anneal temperature is used, the (2 × 3) phase co-exists with short-range ordered regions of Sr atoms located at valley-bridge sites.

KW - Alkaline earth metals

KW - Low energy electron diffraction (LEED)

KW - Low index single crystal surfaces

KW - Molecular beam epitaxy

KW - Silicon

KW - Surface structure, morphology, roughness, and topography

KW - X-ray standing waves

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JO - Surface Science

JF - Surface Science

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ER -

X-ray standing wave study of the Sr/Si(0 0 1)-(2 × 3) surface

Abstract

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Keywords

ASJC Scopus subject areas

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