Abstract
Theoretical and experimental studies have been made on crystal-truncation-rod (CTR) scattering when x rays satisfy the Bragg condition. Calculations were made on the basis of a dynamical theory in Darwin’s approach extended to a multibeam case. Calculated results indicated that the profile of intensity changes of CTR scattering as a function of incident angle under the Bragg condition is sensitive to surface structures. It was made clear by kinematical treatment that the profile reflects x-ray intensity changes of the standing-wave field at an atomic layer on a substrate crystal when x-ray scattering amplitude by the surface layer is larger than CTR scattering amplitude by the substrate, particularly in the case of intensity measurements on fractional-order rods of superstructures formed on the substrate crystal. The experimental result obtained for a Si (001) crystal was in good agreement with the theoretical calculation. Detailed analysis suggested that a strain field caused by the native oxide layer spreads from the surface of the substrate crystal to a depth of hundreds of Å.
Original language | English |
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Pages (from-to) | 3630-3638 |
Number of pages | 9 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 62 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2000 Jan 1 |
Externally published | Yes |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics