Analysis of the dimerized Sb/Si(001)-(2x1) surface by x-ray standing waves
Conference
·
OSTI ID:10119502
- Northwestern Univ., Evanston, IL (United States)
X-ray standing wave measurements were undertaken to study the bonding position of Sb adatoms on the Sb-saturated Si(001)-(2x1) surface. Using the (004) and (022) Bragg reflections, the authors find that the Sb atoms form dimers, and that the center of the Sb ad-dimers lies 1.64 {angstrom} above the bulk-like Si(004) surface atomic plane. These in-plane results are compared to two structural models consisting of dimers whose bonds are parallel to the surface plane and whose centers are either shifted or unshifted (parallel to the dimer bond direction) relative to the underlying substrate planes. The authors thus find two special cases consistent with these data: one with symmetric (unshifted) dimers having a dimer bond length of 2.81 {angstrom}, and the other with midpoint-shifted dimers, having a bond length of 2.88 {angstrom} and a lateral shift of 0.21 {angstrom}.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 10119502
- Report Number(s):
- ANL/MSD/CP--85241; CONF-941144--61; ON: DE95007097
- Country of Publication:
- United States
- Language:
- English
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