X-Ray Absorption in Layered Crystals

Extended x-ray absorption fine struture (EXAFS) spectra have been obtained for a group of layered transitional-metal dichalcogenide crystals, including the nonstoichiometric compounds Ti(,1+x)Se(,2) and the alloys Zr(,x)Ti(,1-x)Se(,2). Fourier transform analysis of the EXAFS spectra has been performed in order to test the theoretical phase and amplitude functions of Teo and Lee. Application of this analytic procedure to spectra of Zr(,x)Ti(,1-x)Se(,2), for x = .07, .11, and .21, indicates that the Zr substitutes for Ti and that the Zr-Se interatomic distance is 2.63 (ANGSTROM), as compared to the Ti-Se distance (2.53 (ANGSTROM)) in TiSe(,2), and the Zr-Se distance (2.68 (ANGSTROM)) in ZrSe(,2).

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Davies, Brian Maurice

• Physics, Condensed Matter

Language dc:language

eng

Identifier

(UMI)AAI8114407

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/77200