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Direct determination of the zero-field splitting for a single Co2+ ion embedded in a CdTe/ZnTe quantum dot

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cris.lastimport.scopus2024-02-12T20:37:21Z
dc.abstract.enWhen a Co2+ impurity is embedded in a semiconductor structure, crystal strain strongly influences the zero-field splitting between Co2+ states with spin projection Sz = ±3/2 andSz = ±1/2. Experimental evidence of this effect has been given in previous studies; however, direct measurement of the strain-induced zero-field splitting has been inaccessible so far. Here this splitting is determined thanks to magneto-optical studies of an individual Co2+ ion in an epitaxial CdTe quantum dot in a ZnTe barrier. Using partially allowed optical transitions, we measure the strain-induced zero-field splitting of the Co2+ ion directly in the excitonic photoluminescence spectrum. Moreover, by observation of anticrossing of Sz = +3/2 and Sz = −1/2 Co2+ spin states in a magnetic field, we determine the axial and in-plane components of the crystal field acting on the Co2+. The proposed technique can be applied to optical determination of the zero-field splitting of other transition-metal ions in quantum dots.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorPotemski, Marek
dc.contributor.authorKoperski, Maciej
dc.contributor.authorPapaj, M.
dc.contributor.authorBogucki, Aleksander
dc.contributor.authorSmoleński, Tomasz
dc.contributor.authorGolnik, Andrzej
dc.contributor.authorKobak, Jakub
dc.contributor.authorKossacki, Piotr
dc.contributor.authorPacuski, Wojciech
dc.date.accessioned2024-01-24T21:54:00Z
dc.date.available2024-01-24T21:54:00Z
dc.date.issued2018
dc.description.financeNie dotyczy
dc.identifier.doi10.1103/PHYSREVB.97.045305
dc.identifier.issn2469-9950
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/104936
dc.languageeng
dc.pbn.affiliationphysical sciences
dc.relation.ispartofPhysical Review B
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.titleDirect determination of the zero-field splitting for a single Co2+ ion embedded in a CdTe/ZnTe quantum dot
dc.typeJournalArticle
dspace.entity.typePublication