Crystal truncation rods from miscut surfaces
- Stanford Univ., Palo Alto, CA (United States); The Stanford Institute for Materials and Energy Sciences (SIMES), SLAC National Accelerator Lab., and Stanford Univ., Menlo Park, CA (United States)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
Crystal truncation rods are used to study surface and interface structure. Since real surfaces are always somewhat miscut from a low index plane, it is important to study the effect of miscuts on crystal truncation rods. We develop a model that describes the truncation rod scattering from miscut surfaces that have steps and terraces. We show that nonuniform terrace widths and jagged step edges are both forms of roughness that decrease the intensity of the rods. Nonuniform terrace widths also result in a broad peak that overlaps the rods. We use our model to characterize the terrace width distribution and step edge jaggedness on three SrTiO3 (001) samples, showing excellent agreement between the model and the data, confirmed by atomic force micrographs of the surface morphology. As a result, we expect our description of terrace roughness will apply to many surfaces, even those without obvious terracing.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC02-76SF00515; ECCS-1542152
- OSTI ID:
- 1368755
- Alternate ID(s):
- OSTI ID: 1355956
- Journal Information:
- Physical Review B, Vol. 95, Issue 18; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
How heteroepitaxy occurs on strontium titanate
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journal | April 2019 |
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