期刊
ACS NANO
卷 14, 期 7, 页码 9032-9041出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.0c04048
关键词
diluted magnetic semiconductors; CdSe nanoplatelet; colloidal nanocrystals; magneto-optics; spin flip Raman scattering; optically detected magnetic resonance
类别
资金
- Deutsche Forschungsgemeinschaft through the International Collaborative Research Center [TRR 160]
- Russian Foundation for Basic Research [19-52-12064 NNIOa]
- Russian Science Foundation [18-12-00352, 20-42-01008]
- Singapore National Research Foundation [NRF-NRFI2016-08]
- Grants Council of the President of the Russian Federation
- Polish National Science Center [2018/30/M/ST3/00276]
- TUBA
- Russian Science Foundation [18-12-00352, 20-42-01008] Funding Source: Russian Science Foundation
Excitons in diluted magnetic semiconductors represent excellent probes for studying the magnetic properties of these materials. Various magneto-optical effects, which depend sensitively on the exchange interaction of the excitons with the localized spins of the magnetic ions can be used for probing. Here, we study core/shell CdSe/(Cd,Mn)S colloidal nanoplatelets hosting diluted magnetic semiconductor layers. The inclusion of the magnetic Mn-2(+) ions is evidenced by three magneto-optical techniques using high magnetic fields up to 15 T: polarized photoluminescence, optically detected magnetic resonance, and spin-flip Raman scattering. We show that the holes in the excitons play the dominant role in exchange interaction with magnetic ions. We suggest and test an approach for evaluation of the Mn2+ concentration based on the spin-lattice relaxation dynamics of the Mn2+ spin system.
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