X-Ray Standing Waves in Thin Crystals: Probing the Polarity of Thin Epitaxial Films

A. Kazimirov, J. Zegenhagen, T. L. Lee, Michael J Bedzyk

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

In thin crystals, an X-ray standing wave field is generated by the interference between the strong incident wave and the weak Bragg diffracted X-ray wave. Though the spatial modulation of the interference field is greatly reduced, the XSW method retains the same structural sensitivity as in thick perfect crystals diffracting dynamically. Because the diffraction curve from a thin crystal is broad, the XSW technique is much less sensitive to lattice imperfections. As examples, we demonstrate in this chapter how this technique can be applied to determine the “as-grown” and “externally switched” polarity in epitaxial thin films. With modern SR sources, the standing wave in an ultra-thin film of only 25 unit cells can be generated and utilized for precise structural investigation.
Original languageEnglish (US)
Title of host publicationThe X-Ray Standing Wave Technique: Principles and Applications
EditorsJorg Zengengahen, Alexander Kazimirov
PublisherWorld Scientific Publishing Company
Pages326-341
Number of pages16
ISBN (Electronic)978-981-4513-10-4
ISBN (Print)978-981-277-900-7
StatePublished - Apr 15 2013

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