Two-beam dynamical diffraction solution of the phase problem: A determination with x-ray standing-wave fields

M. J. Bedzyk*, G. Materlik

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

71 Scopus citations

Abstract

Using the dynamical theory of Bragg diffraction, we show that there is a direct relationship between the phase of the x-ray standing-wave field and the phase of the structure factor. For an experimental demonstration, we monitor the Ga and As K fluorescence and resonant Raman scattering yields, while scanning through the (111) and (200) Bragg diffraction rocking curves of GaAs perfect single crystals. The phases of the (111) and (200) GaAs structure factors are determined from the phases of the modulations in these secondary yields. With the use of monochromatized synchrotron radiation, with a variable photon energy between 10 and 15 keV, the effect of anomalous dispersion on the structure-factor phases is clearly seen in the vicinity of the Ga and As K absorption edges. We use this feature, in conjunction with the measured absorption spectrum, for directly determining the dispersion parameters f and f for atoms which appear in single-crystal structures.

Original languageEnglish (US)
Pages (from-to)6456-6463
Number of pages8
JournalPhysical Review B
Volume32
Issue number10
DOIs
StatePublished - 1985

ASJC Scopus subject areas

  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Two-beam dynamical diffraction solution of the phase problem: A determination with x-ray standing-wave fields'. Together they form a unique fingerprint.

Cite this