Soft x-ray near edge spectroscopy of cuprous oxide and silicon-germanium alloys
Hulbert, Steven Lloyd
This item is only available for download by members of the University of Illinois community. Students, faculty, and staff at the U of I may log in with your NetID and password to view the item. If you are trying to access an Illinois-restricted dissertation or thesis, you can request a copy through your library's Inter-Library Loan office or purchase a copy directly from ProQuest.
Permalink
https://hdl.handle.net/2142/25341
Description
Title
Soft x-ray near edge spectroscopy of cuprous oxide and silicon-germanium alloys
Author(s)
Hulbert, Steven Lloyd
Issue Date
1984
Doctoral Committee Chair(s)
Brown, Frederick C.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
high resolution soft x-ray absroption near edge structure (XANES)
silicon-germanium semiconductor alloys
cuprous oxide
crystal structure
Language
en
Abstract
High resolution soft x-ray absorption near edge structure (XANES) spectra have been obtained for CU20 and for SiGe1-x semiconductor alloys,
xas a function of composition x, using the methods of partial electron yield and thin film absorption. The shapes of the near edge features provide a unique fingerprint of the local crystal structure (symmetries, coordinations, bond lengths, etc.) in the bulk. A strong asymmetric peak at threshold in Cu20 is probably best described as a Frenkel core exciton corresponding to an allowed Cu 2p + alg molecular orbital transition of the rare linear (0-Cu-0)3-molecular unit characteristic of Cu20. A dramatic change in the observed soft x-ray absorption near edge structure (XANES)
for x =
0.15 in SixGe1-x is consistent with the x-dependence predicted
for
this alloy system by Newman and Dow.
The
design,
operating
characteristics,
and
advantages
of
the
University of Illinois
beam
line
at
the
1 GeV
electron
storage
ring
Aladdin, including the new extended range grasshopper (ERG) grazing incidence grating monochromator for use in the VUV and soft x-ray spectral ranges, are presented.
Use this login method if you
don't
have an
@illinois.edu
email address.
(Oops, I do have one)
IDEALS migrated to a new platform on June 23, 2022. If you created
your account prior to this date, you will have to reset your password
using the forgot-password link below.