Au-rich filamentary behavior and associated subband gap optical absorption in hyperdoped Si

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dc.contributor.authorYang, Wenjie
dc.contributor.authorAkey, Austin J.
dc.contributor.authorSmillie, Lachlan
dc.contributor.authorMailoa, Jonathan P.
dc.contributor.authorJohnson, B. C.
dc.contributor.authorMcCallum, J. C.
dc.contributor.authorMacdonald, Daniel
dc.contributor.authorBuonassisi, Tonio
dc.contributor.authorAziz, Michael
dc.contributor.authorWilliams, James
dc.date.accessioned2021-05-11T04:19:51Z
dc.date.available2021-05-11T04:19:51Z
dc.date.issued2017
dc.date.updated2020-11-23T10:13:13Z
dc.description.abstractAu-hyperdoped Si, synthesized by ion implantation and pulsed laser melting, is known to exhibit a strong sub-band gap photoresponse that scales monotonically with the Au concentration. However, there is thought to be a limit to this behavior since ultrahigh Au concentrations (>1 x 10(20) cm(-3)) are expected to induce cellular breakdown during the rapid resolidification of Si, a process that is associated with significant lateral impurity precipitation. This work shows that the cellular morphology observed in Au-hyperdoped Si differs from that in conventional, steady-state cellular breakdown. In particular, Rutherford backscattering spectrometry combined with channeling and transmission electron microscopy revealed an inhomogeneous Au distribution and a subsurface network of Au-rich filaments, within which the Au impurities largely reside on substitutional positions in the crystalline Si lattice, at concentrations as high as similar to 3 at. %. The measured substitutional Au dose, regardless of the presence of Au-rich filaments, correlates strongly with the sub-band gap optical absorptance. Upon subsequent thermal treatment, the supersaturated Au forms precipitates, while the Au substitutionality and the sub-band gap optical absorption both decrease. These results offer insight into a metastable filamentary regime in Au-hyperdoped Si that has important implications for Si-based infrared optoelectronics.en_AU
dc.description.sponsorshipThe US Army (Contract No. FA5209-16-P-0104) for partial financial support of this project.en_AU
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn2475-9953en_AU
dc.identifier.urihttp://hdl.handle.net/1885/232627
dc.language.isoen_AUen_AU
dc.provenancehttps://v2.sherpa.ac.uk/id/publication/33503..."Author can archive publisher's version/PDF" from SHERPA/RoMEO site (as at 11/05/2021)en_AU
dc.publisherAmerican Physical Societyen_AU
dc.relationhttp://purl.org/au-research/grants/arc/LP160100981en_AU
dc.rights© 2017 American Physical Societyen_AU
dc.sourcePhysical Review Materialsen_AU
dc.titleAu-rich filamentary behavior and associated subband gap optical absorption in hyperdoped Sien_AU
dc.typeJournal articleen_AU
dcterms.accessRightsOpen Accessen_AU
local.bibliographicCitation.issue7en_AU
local.bibliographicCitation.lastpage074602-10en_AU
local.bibliographicCitation.startpage074602-1en_AU
local.contributor.affiliationYang, Wenjie, College of Science, ANUen_AU
local.contributor.affiliationAkey, Austin J. , Harvard School of Engineering and Applied Scienceen_AU
local.contributor.affiliationSmillie, Lachlan, College of Science, ANUen_AU
local.contributor.affiliationMailoa, Jonathan P, Massachusetts Institute of Technologyen_AU
local.contributor.affiliationJohnson, B C, University of Melbourneen_AU
local.contributor.affiliationMcCallum, J C, University of Melbourneen_AU
local.contributor.affiliationMacDonald, Daniel, College of Engineering and Computer Science, ANUen_AU
local.contributor.affiliationBuonassisi, Tonio, Massachusetts Institute of Technologyen_AU
local.contributor.affiliationAziz, Michael, Harvard Universityen_AU
local.contributor.affiliationWilliams, James, College of Science, ANUen_AU
local.contributor.authoremailu5313693@anu.edu.auen_AU
local.contributor.authoruidYang, Wenjie, u5510882en_AU
local.contributor.authoruidSmillie, Lachlan, u5313693en_AU
local.contributor.authoruidMacDonald, Daniel, u9718154en_AU
local.contributor.authoruidWilliams, James, u8809701en_AU
local.description.notesImported from ARIESen_AU
local.identifier.absfor020406 - Surfaces and Structural Properties of Condensed Matteren_AU
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciencesen_AU
local.identifier.ariespublicationu4485658xPUB717en_AU
local.identifier.citationvolume1en_AU
local.identifier.doi10.1103/PhysRevMaterials.1.074602en_AU
local.identifier.thomsonID000418774700003
local.identifier.uidSubmittedByu4485658en_AU
local.publisher.urlhttps://journals.aps.orgen_AU
local.type.statusPublished Versionen_AU

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