Defect-induced magnetism in II-VI quantum dots
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The identiﬁcation of physical parameters that lead to magnetism in apparent non-magnetic semiconductor systems have continuously challenged our community. In particular, for quantum-dot systems, they are key factors that contribute to their magneto-optical properties. We report, experimentally, optical evidences of induced nano-magnetism in non-magnetic CdSe quantum-dots and assess theoretically the role played by charged and uncharged vacancies. The analysis of these effects rests upon both the chemical and strain environments where the quantum dots are embedded. The interplay of spin-orbit interaction with built-in axial strains has been demonstrated to be a key factor for the magnetic moment alignment. This has been achieved in this paper by emulating the electronic structure at atomistic levels, considering various defect conﬁgurations and taking into account both the quantum dot composition and the inﬂuence of the host lattice.
Lima , M P , Cabral , L , Margapoti , E , Mahapatra , S , Da Silva , J L F , Hartmann , F , Höfling , S , Marques , G E & Lopez-Richard , V 2019 , ' Defect-induced magnetism in II-VI quantum dots ' Physical Review. B, Condensed matter and materials physics .
Physical Review. B, Condensed matter and materials physics
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