sp-d exchange interactions in wave function engineered colloidal CdSe/Mn: CdS Hetero-Nanoplatelets

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buir.contributor.authorHernández-Martínez, Pedro Ludwig
buir.contributor.authorSharma, Manoj
buir.contributor.authorDemir, Hilmi Volkan
buir.contributor.orcidDemir, Hilmi Volkan|0000-0003-1793-112X
dc.citation.epage2053en_US
dc.citation.issueNumber3en_US
dc.citation.spage2047en_US
dc.citation.volumeNumber18en_US
dc.contributor.authorMuckel, F.en_US
dc.contributor.authorDelikanlı S.en_US
dc.contributor.authorHernández-Martínez, Pedro Ludwigen_US
dc.contributor.authorPriesner, T.en_US
dc.contributor.authorLorenz, S.en_US
dc.contributor.authorAckermann, J.en_US
dc.contributor.authorSharma, Manojen_US
dc.contributor.authorDemir, Hilmi Volkanen_US
dc.contributor.authorBacher, G.en_US
dc.date.accessioned2019-02-21T16:02:17Zen_US
dc.date.available2019-02-21T16:02:17Zen_US
dc.date.issued2018en_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentDepartment of Physicsen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractIn two-dimensional (2D) colloidal semiconductor nanoplatelets, which are atomically flat nanocrystals, the precise control of thickness and composition on the atomic scale allows for the synthesis of heterostructures with well-defined electron and hole wave function distributions. Introducing transition metal dopants with a monolayer precision enables tailored magnetic exchange interactions between dopants and band states. Here, we use the absorption based technique of magnetic circular dichroism (MCD) to directly prove the exchange coupling of magnetic dopants with the band charge carriers in hetero-nanoplatelets with CdSe core and manganese-doped CdS shell (CdSe/Mn:CdS). We show that the strength of both the electron as well as the hole exchange interactions with the dopants can be tuned by varying the nanoplatelets architecture with monolayer accuracy. As MCD is highly sensitive for excitonic resonances, excited level spectroscopy allows us to resolve and identify, in combination with wave function calculations, several excited state transitions including spin-orbit split-off excitonic contributions. Thus, our study not only demonstrates the possibility to expand the extraordinary physical properties of colloidal nanoplatelets toward magneto-optical functionality by transition metal doping but also provides an insight into the excited state electronic structure in this novel two-dimensional material.en_US
dc.description.provenanceMade available in DSpace on 2019-02-21T16:02:17Z (GMT). No. of bitstreams: 1 Bilkent-research-paper.pdf: 222869 bytes, checksum: 842af2b9bd649e7f548593affdbafbb3 (MD5) Previous issue date: 2018en_US
dc.description.sponsorshipThis research is supported by the German Research Foundation DFG under contract BA-1422 and the National Research Foundation, Prime Minister’s Office, Singapore under its Investigatorship program (NRF-NRFI2016-08). H.V.D. gratefully acknowledges TUBA.en_US
dc.identifier.doi10.1021/acs.nanolett.8b00060en_US
dc.identifier.eissn1530-6992en_US
dc.identifier.issn1530-6984en_US
dc.identifier.urihttp://hdl.handle.net/11693/49989en_US
dc.language.isoEnglishen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.isversionofhttps://doi.org/10.1021/acs.nanolett.8b00060en_US
dc.relation.projectBA-1422 - National Research Foundation, NRF - NRF-NRFI2016-08en_US
dc.source.titleNano Lettersen_US
dc.titlesp-d exchange interactions in wave function engineered colloidal CdSe/Mn: CdS Hetero-Nanoplateletsen_US
dc.typeArticleen_US

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Institute of Materials Science and Nanotechnology (UNAM)
Department of Electrical and Electronics Engineering
Department of Physics