Valence band study of Mg/sub 2/Si by Auger spectroscopy

Journal Article · Fri Apr 01 04:00:00 EST 1983 · J. Vac. Sci. Technol., A; (United States)

DOI:https://doi.org/10.1116/1.571960· OSTI ID:5773420

Bevolo, A J; Shanks, H R

Previous XPS measurements of Mg/sub 2/Si revealed three valence bands which were all assigned to the Si 3s and 3p states based on a completely ionic model of the bonding in Mg/sub 2/Si that assumed no occupied Mg 3s or 3p states. Auger spectroscopy is element specific so that the local density of states of Mg and Si can be measured separately. The L/sub 1/L/sub 23/V and the L/sub 23/VV Auger spectra of Mg in Mg/sub 2/Si were measured from a single crystal of Mg/sub 2/Si cleaved in UHV. The L/sub 23/VV spectrum showed the involvement of the Mg 3p state in the upper two valence bands in agreement with recent calculations. More surprisingly the L/sub 1/L/sub 23/V spectrum gave evidence of the presence of the Mg 3s state in the lowest energy valence band that had not been predicted. The Auger results gave evidence of covalency in the bonding of Mg/sub 2/Si.

• Research Organization: Ames Laboratory, USDOE and Department of Physics, Iowa State University, Iowa 50011
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5773420
• Journal Information: J. Vac. Sci. Technol., A; (United States), Journal Name: J. Vac. Sci. Technol., A; (United States) Vol. 1:2; ISSN JVTAD
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
AUGER ELECTRON SPECTROSCOPY
BAND THEORY
CHEMICAL BONDS
COVALENCE
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY LEVELS
ENERGY SPECTRA
ENERGY-LEVEL DENSITY
MAGNESIUM
MAGNESIUM COMPOUNDS
MAGNESIUM SILICIDES
METALS
P STATES
S STATES
SEMIMETALS
SILICIDES
SILICON
SILICON COMPOUNDS
SPECTRA
SPECTROSCOPY
ULTRAHIGH VACUUM
VALENCE