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Electronic Band Structure of Magnesium and Magnesium Oxide: Experiment and Theory

Canney, S; Sashin, V A; Ford, Michele; Kheifets, Anatoli

Description

Electron momentum spectroscopy (EMS) has been used to measure the valence band electronic structure of thin magnesium and magnesium oxide films. The band structures have also been calculated within the linear muffin-tin orbital (LMTO) approximation. The free-electron-like parabola characteristic of metallic solids was observed for magnesium with a bandwidth of approximately 6eV, in agreement with previous measurements. The inclusion of energy broadening due to finite hole-lifetime effects and a...[Show more]

dc.contributor.authorCanney, S
dc.contributor.authorSashin, V A
dc.contributor.authorFord, Michele
dc.contributor.authorKheifets, Anatoli
dc.date.accessioned2015-12-13T23:34:50Z
dc.date.available2015-12-13T23:34:50Z
dc.identifier.issn0953-8984
dc.identifier.urihttp://hdl.handle.net/1885/93631
dc.description.abstractElectron momentum spectroscopy (EMS) has been used to measure the valence band electronic structure of thin magnesium and magnesium oxide films. The band structures have also been calculated within the linear muffin-tin orbital (LMTO) approximation. The free-electron-like parabola characteristic of metallic solids was observed for magnesium with a bandwidth of approximately 6eV, in agreement with previous measurements. The inclusion of energy broadening due to finite hole-lifetime effects and a Monte Carlo simulation of multiple scattering events gives good agreement between calculated and measured band structures. However, we measure a much higher intensity due to plasmon excitation compared with the simulated intensity. Upon oxidation the valence structure splits into two distinct, less dispersive bands typical of an ionic solid. Intensity due to plasmon excitation was almost completely absent in the experimental spectra for magnesium oxide. The LMTO calculation reproduces the overall structure and dispersion range of the oxide. The measured and calculated energy gap between upper and lower valence bands and their relative intensities do not agree quantitatively. This discrepancy may be due to a contribution of magnesium s states to the predominantly oxygen p states in the upper band.
dc.publisherInstitute of Physics Publishing
dc.sourceJournal of Physics: Condensed Matter
dc.titleElectronic Band Structure of Magnesium and Magnesium Oxide: Experiment and Theory
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume11
dc.date.issued1999
local.identifier.absfor020201 - Atomic and Molecular Physics
local.identifier.ariespublicationMigratedxPub25016
local.type.statusPublished Version
local.contributor.affiliationCanney, S, Flinders University
local.contributor.affiliationSashin, V A, Flinders University
local.contributor.affiliationFord, Michele, Flinders University
local.contributor.affiliationKheifets, Anatoli, College of Physical and Mathematical Sciences, ANU
local.bibliographicCitation.issue39
local.bibliographicCitation.startpage7507
local.bibliographicCitation.lastpage7522
local.identifier.doi10.1088/0953-8984/11/39/308
dc.date.updated2015-12-12T09:37:39Z
local.identifier.scopusID2-s2.0-0000594882
CollectionsANU Research Publications

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