Dissertation/Thesis Abstract

Pressure and photo-induced modification of structural and chemical order in binary and elemental chalcogenide based materials
by Lindberg, George P., Ph.D., State University of New York at Buffalo, 2016, 205; 10127623
Abstract (Summary)

This dissertation explores the effects of pressure and light on chalcogenide based materials. In ZnSe, ZnTe, and CdSe the surprising precipitation of the constituent anion under hydrostatic pressure and moderate laser exposure in high quality bulk and MBE film samples is explored in detail. In ZnSe the anomalous broadening in the TO(Γ) phonon region is explored by careful low laser power pressure cycling experiments. The experimental results are supported with density functional theory calculations of the phonon band structure. Finally, the photo-induced crystallization onset of amorphous selenium films is explored as a function of temperature and substrate structure. The morphology of the photocrystallized spots is also explored using Raman mapping, optical microscopy, and atomic force microscopy.

Indexing (document details)
Advisor: Weinstein, Bernard A.
Commitee: Cerne, John, Zhang, Peihong
School: State University of New York at Buffalo
Department: Physics
School Location: United States -- New York
Source: DAI-B 77/10(E), Dissertation Abstracts International
Subjects: Geology, Physics, Condensed matter physics
Keywords: Chalcogenide, High pressure, Phase changes, Raman, Semiconductors, Structural disorder
Publication Number: 10127623
ISBN: 978-1-339-85655-1
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