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Title: Light-induced paramagnetism in colloidal Ag+-doped CdSe nanoplatelets
Authors: Najafi, Arman
Sharma, Manoj
Delikanli, Savas
Bhattacharya, Arinjoy
Murphy, Joseph R.
Pientka, James
Sharma, Ashma
Quinn, Alexander P.
Erdem, Onur
Kattel, Subash
Kelestemur, Yusuf
Kovalenko, Maksym V.
Rice, William D.
Demir, Hilmi Volkan
Petrou, Athos
Keywords: Engineering::Materials
Issue Date: 2021
Source: Najafi, A., Sharma, M., Delikanli, S., Bhattacharya, A., Murphy, J. R., Pientka, J., Sharma, A., Quinn, A. P., Erdem, O., Kattel, S., Kelestemur, Y., Kovalenko, M. V., Rice, W. D., Demir, H. V. & Petrou, A. (2021). Light-induced paramagnetism in colloidal Ag+-doped CdSe nanoplatelets. Journal of Physical Chemistry Letters, 12(11), 2892-2899.
Journal: Journal of Physical Chemistry Letters 
Abstract: We describe a study of the magneto-optical properties of Ag+-doped CdSe colloidal nanoplatelets (NPLs) that were grown using a novel doping technique. In this work, we used magnetic circularly polarized luminescence and magnetic circular dichroism spectroscopy to study light-induced magnetism for the first time in 2D solution-processed structures doped with nominally nonmagnetic Ag+ impurities. The excitonic circular polarization (PX) and the exciton Zeeman splitting (ΔEZ) were recorded as a function of the magnetic field (B) and temperature (T). Both ΔEZ and PX have a Brillouin-function-like dependence on B and T, verifying the presence of paramagnetism in Ag+-doped CdSe NPLs. The observed light-induced magnetism is attributed to the transformation of nonmagnetic Ag+ ions into Ag2+, which have a nonzero magnetic moment. This work points to the possibility of incorporating these nanoplatelets into spintronic devices, in which light can be used to control the spin injection.
ISSN: 1948-7185
DOI: 10.1021/acs.jpclett.1c00398
Schools: School of Electrical and Electronic Engineering 
School of Physical and Mathematical Sciences 
Research Centres: LUMINOUS! Centre of Excellence for Semiconductor Lighting & Displays 
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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