Journal article
Determination of the interfacial roughness exponent in rare-earth superlattices
The interfacial roughness in Ho/Y and Ho/Lu superlattices has been studied using high-resolution x-ray diffraction. The transverse width of the superlattice Bragg peaks broadens almost linearly as a function of the component of the reduced wave vector parallel to the growth direction, while the line shape is invariant, and is described by a Lorentzian raised to the power of approximate to 5/2.
These results are interpreted as a signature of conformally rough interfaces, and the roughness exponent is determined to be alpha = 0.85 +/- 0.05. It is also shown how alpha may be altered by adjusting the growth conditions.
Language: | English |
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Year: | 1994 |
Pages: | 2232-2235 |
ISSN: | 10797114 and 00319007 |
Types: | Journal article |
DOI: | 10.1103/PhysRevLett.73.2232 |