Giant Zeeman splitting in nucleation-controlled doped CdSe:Mn2+ quantum nanoribbons
SCIE
SCOPUS
- Title
- Giant Zeeman splitting in nucleation-controlled doped CdSe:Mn2+ quantum nanoribbons
- Authors
- Yu, JH; Liu, XY; Kweon, KE; Joo, J; Park, J; Ko, KT; Lee, D; Shen, SP; Tivakornsasithorn, K; Son, Jae Sung; Park, JH; Kim, YW; Hwang, GS; Dobrowolska, M; Furdyna, JK; Hyeon, T
- Date Issued
- 2010-01
- Publisher
- NATURE PUBLISHING GROUP
- Abstract
- Doping of semiconductor nanocrystals by transition-metal ions has attracted tremendous attention owing to their nanoscale spintronic applications. Such doping is, however, difficult to achieve in low-dimensional strongly quantum confined nanostructures by conventional growth procedures. Here we demonstrate that the incorporation of manganese ions up to 10% into CdSe quantum nanoribbons can be readily achieved by a nucleation-controlled doping process. The cation-exchange reaction of (CdSe)(13) clusters with Mn2+ ions governs the Mn2+ incorporation during the nucleation stage. This highly efficient Mn2+ doping of the CdSe quantum nanoribbons results in giant exciton Zeeman splitting with an effective g-factor of similar to 600, the largest value seen so far in diluted magnetic semiconductor nanocrystals. Furthermore, the sign of the s-d exchange is inverted to negative owing to the exceptionally strong quantum confinement in our nanoribbons. The nucleation-controlled doping strategy demonstrated here thus opens the possibility of doping various strongly quantum confined nanocrystals for diverse applications.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/26086
- DOI
- 10.1038/NMAT2572
- ISSN
- 1476-1122
- Article Type
- Article
- Citation
- NATURE MATERIALS, vol. 9, no. 1, page. 47 - 53, 2010-01
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- There are no files associated with this item.
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