Abstract
X-ray standing waves generated by dynamical Bragg diffraction were used as an element-specific structural probe for investigating Ga and Sb adsorption on Si(001). Using the (004) and (022) reflections, we precisely measured Ga and Sb ad-dimer bond lengths and ad-dimer heights above the bulk-extrapolated Si(001) surface. The room temperature [001] thermal vibration amplitudes of Ga and Sb adatoms on Si(001) were also directly determined by combining the fundamental (004) and high-order harmonic (008) X-ray standing wave measurements. These high-resolution measurements reveal important quantitative structural information regarding the dimerized surface structures, and provide a stringent test for structural models proposed by various theoretical calculations. In this paper, we also give an overview of the X-ray standing wave technique and its application in investigating surface structure and dynamics.
Original language | English (US) |
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Pages (from-to) | 969-980 |
Number of pages | 12 |
Journal | Scanning Microscopy |
Volume | 9 |
Issue number | 4 |
State | Published - 1995 |
Keywords
- Ga
- Sb
- Si(001)
- X-ray standing wave
- dimer orientation
- surface structure
- thermal vibrational amplitude
ASJC Scopus subject areas
- Instrumentation