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A model dielectric function for low and very high momentum transfer

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dc.contributor.authorVos, Maarten
dc.date.accessioned2016-02-24T22:41:14Z
dc.date.issued2016
dc.date.updated2016-02-24T10:10:35Z
dc.description.abstractA model dielectric function is derived for TiO2 based on reflection electron energy loss spectroscopy data and photoabsorption cross sections. The model is based on a set of Mermin oscillators. The input data is dominated by excitations at low momentum transfer, i.e. near the optical limit. Surprisingly the dielectric function derived at low momentum transfer describes the Compton profile quite well, while approaches based on Drude oscillators fail dramatically. The link between the dielectric function in the high-momentum transfer limit and a Compton profile is discussed. The underlying reason why the Mermin approach, which is based on a free electron model, is successful in describing the Compton profile is tentatively discussed.
dc.identifier.issn0168-583X
dc.identifier.urihttp://hdl.handle.net/1885/98613
dc.publisherElsevier
dc.sourceNuclear Instruments and Methods in Physics Research: Section B
dc.titleA model dielectric function for low and very high momentum transfer
dc.typeJournal article
local.bibliographicCitation.lastpage12
local.bibliographicCitation.startpage6
local.contributor.affiliationVos, Maarten, College of Physical and Mathematical Sciences, ANU
local.contributor.authoruidVos, Maarten, u9700295
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor020200 - ATOMIC, MOLECULAR, NUCLEAR, PARTICLE AND PLASMA PHYSICS
local.identifier.absfor020400 - CONDENSED MATTER PHYSICS
local.identifier.ariespublicationU3488905xPUB6424
local.identifier.citationvolume366
local.identifier.doi10.1016/j.nimb.2015.09.091
local.identifier.scopusID2-s2.0-84944345466
local.type.statusPublished Version

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