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Structural and optical properties of phase-change amorphous and crystalline Ge1-x Tex (0 ˂ x ˂ 1) thin films

Title
Structural and optical properties of phase-change amorphous and crystalline Ge1-x Tex (0 ˂ x ˂ 1) thin films
Author
정두석
Keywords
germanium telluride; joint density of states; Raman spectroscopy; spectroscopic ellipsometry
Issue Date
2012-10
Publisher
Wiley
Citation
Physica Status Solidi (A) Applications and Materials Science, February 2013, 210(2), p.267-275
Abstract
Ge1 − xTex thin films were grown using thermal coevaporation deposition. The dielectric functions and the phonon modes of amorphous (a‐) and crystalline (c‐) Ge1 − xTex films were measured using spectroscopic ellipsometry and Raman spectroscopy in order to investigate electronic and vibrational properties of these alloys. Using the second derivative spectra of the dielectric functions of a‐Ge1 − xTex alloys and the standard critical point (SCP) model, we obtained optical transition energies for the a‐Ge1 − xTex alloys. The optical transition energies were not only consistent with the density of states (DOS) reported in the literature, but also provided more detailed structures for the joint density of states (JDOS) of a‐Ge1 − xTex.
URI
https://onlinelibrary.wiley.com/doi/full/10.1002/pssa.201228555http://hdl.handle.net/20.500.11754/67239
ISSN
0031-8965
DOI
10.1002/pssa.201228555
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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