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2018-11-30Zeitschriftenartikel DOI: 10.18452/24111
First-principles many-body study of the electronic and optical properties of CsK2Sb, a semiconducting material for ultra-bright electron sources
dc.contributor.authorCocchi, Caterina
dc.contributor.authorMistry, Sonal
dc.contributor.authorSchmeißer, Martin
dc.contributor.authorKühn, Julius
dc.contributor.authorKamps, Thorsten
dc.date.accessioned2022-02-04T11:47:06Z
dc.date.available2022-02-04T11:47:06Z
dc.date.issued2018-11-30none
dc.date.updated2022-02-01T17:30:25Z
dc.identifier.urihttp://edoc.hu-berlin.de/18452/24753
dc.description.abstractWe present a comprehensive first-principles investigation of the electronic and optical properties of CsK2Sb, a semiconducting material for ultra-bright electron sources for particle accelerators. Our study, based on density-functional theory and many-body perturbation theory, provides all the ingredients to model the emission of this material as a photocathode, including band gap, band dispersion, and optical absorption. An accurate description of these properties beyond the mean-field picture is relevant to take into account many-body effects. We discuss our results in the context of state-of-the-art electron sources for particle accelerators to set the stage towards improved modeling of quantum efficiency, intrinsic emittance, and other relevant quantities determining the macroscopic characteristics of photocathodes for ultra-bright beams.eng
dc.language.isoengnone
dc.publisherHumboldt-Universität zu Berlin
dc.rights(CC BY 3.0) Attribution 3.0 Unportedger
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/
dc.subjectdensity-functional theoryeng
dc.subjectelectronic structureeng
dc.subjecttheoretical spectroscopyeng
dc.subjectalkali antimonideseng
dc.subject.ddc530 Physiknone
dc.titleFirst-principles many-body study of the electronic and optical properties of CsK2Sb, a semiconducting material for ultra-bright electron sourcesnone
dc.typearticle
dc.identifier.urnurn:nbn:de:kobv:11-110-18452/24753-8
dc.identifier.doihttp://dx.doi.org/10.18452/24111
dc.type.versionpublishedVersionnone
local.edoc.pages10none
local.edoc.type-nameZeitschriftenartikel
local.edoc.container-typeperiodical
local.edoc.container-type-nameZeitschrift
dc.description.versionPeer Reviewednone
dc.identifier.eissn1361-648X
dcterms.bibliographicCitation.doi10.1088/1361-648X/aaedeenone
dcterms.bibliographicCitation.journaltitleJournal of physics. Condensed matternone
dcterms.bibliographicCitation.volume31none
dcterms.bibliographicCitation.issue1none
dcterms.bibliographicCitation.articlenumber014002none
dcterms.bibliographicCitation.originalpublishernameIOP Publishingnone
dcterms.bibliographicCitation.originalpublisherplaceBristolnone
bua.departmentMathematisch-Naturwissenschaftliche Fakultätnone

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