Soft x-ray appearance potential spectroscopy study of MgO (100) and α-Al{sub 2}O{sub 3} (100) single crystals

Journal Article · Fri Nov 15 04:00:00 EST 2013 · Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films

DOI:https://doi.org/10.1116/1.4828785· OSTI ID:22258787

Fukuda, Yasuo; Sanada, Noriaki; Mochizuki, Sachie; Yatsuzuka, Ikuko ^[1]

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1. Research Institute of Electronics, Shizuoka University, Johoku 3-5-1, Naka-ku, Hamamatsu 432-8011 (Japan)

Soft x-ray appearance potential spectroscopy (SXAPS) measurements was used to measure on MgO (100) and α-Al{sub 2}O{sub 3} (100) single crystals. Mg 1s, Al 1s, and O 1s SXAPS self-deconvoluted (SD) spectra were obtained. The features of the Mg 1s and O1s SD spectra are in fair agreement with those of the near-edge x-ray absorption fine structure spectra for an MgO thin film (3 ML) on Ag (100). This suggests that the SXAPS spectra reflect electronic states of the relaxed MgO (100) surface. The features of the Al 1s and O 1s SD spectra are in qualitative agreement with those of the electron energy-loss spectroscopy. The SXAPS SD spectra are discussed in terms of antibonding states and partial density of empty states obtained by theoretical calculations for MgO and α-Al{sub 2}O{sub 3,} respectively. The present result suggests that the “approximate dipole selection rule” is applicable to the SXAPS spectra of MgO and α-Al{sub 2}O{sub 3}, as well as 3d transition metal oxides.

• OSTI ID: 22258787
• Journal Information: Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films, Journal Name: Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films Journal Issue: 6 Vol. 31; ISSN 0734-2101; ISSN JVTAD6
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM OXIDES
ELECTRONS
ENERGY-LOSS SPECTROSCOPY
FINE STRUCTURE
MAGNESIUM OXIDES
MONOCRYSTALS
POTENTIALS
SILVER 100
SOFT X RADIATION
SPECTRA
THIN FILMS
TRANSITION ELEMENTS
X-RAY SPECTROSCOPY