Magneto-optics of excitons interacting with magnetic ions in CdSe/CdMnS colloidal nanoplatelets

Abstract

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. In particular, information on the Mn${}^{2+}$ concentration in the CdS shell layers can be obtained from the spin-lattice relaxation dynamics of the Mn${}^{2+}$ spin system.

References in corpus (2)

• Tunable magnetic exchange interactions in manganese-doped inverted core/shell ZnSe/CdSe nanocrystals
• Single and double electron spin-flip Raman scattering in CdSe colloidal nanoplatelets

Cited by in corpus (8)

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• Spin dynamics of positively charged excitons in Cr${}^{+}$-doped quantum dots probed by resonant photoluminescence
• Magnetic ion relaxation time distribution within a quantum well
• Charging of colloidal nanoplatelets: effect of Coulomb repulsion on spin and optoelectronic properties
• Electron, hole and exciton effective g-factors in semiconductor nanocrystals