Journal ArticleDOI
Magnetic exchange interactions in quantum dots containing electrons and magnetic ions.
Fanyao Qu,Pawel Hawrylak +1 more
TLDR
A theory of magnetic exchange interactions in quantum dots containing electrons and magnetic ions is presented and it is shown how this unusual effect manifests itself in quantum dot addition and excitation spectrum.Abstract:
We present a theory of magnetic exchange interactions in quantum dots containing electrons and magnetic ions. We find the interaction between the electron and Mn ion to depend strongly on the number of electrons. It can be switched off for closed shell configurations and maximized for partially filled shells. However, unlike the total electron spin S which is maximized for half-filled shells, we predict the exchange interaction to be independent of the filling of the electronic shell. We show how this unusual effect manifests itself in quantum dot addition and excitation spectrum.read more
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Journal ArticleDOI
Mn2+-doped CdSe quantum dots: New inorganic materials for spin-electronics and spin-photonics
TL;DR: In this article, the authors provide an overview of efforts to dope one of the most widely studied colloidal semiconductor nanocrystal systems, CdSe quantum dots, with a transition-metal dopant ion, Mn 2+, and describe the major new physical properties that have emerged following successful synthesis of this material.
Journal ArticleDOI
Luminescence in colloidal Mn2+-doped semiconductor nanocrystals
TL;DR: In this paper, a brief overview is provided, focusing on Mn2+-doped II-VI semiconductor nanocrystals prepared by direct chemical synthesis and capped with coordinating surface ligands.
Journal ArticleDOI
Charge-controlled magnetism in colloidal doped semiconductor nanocrystals.
Stefan T. Ochsenbein,Yong Feng,Kelly Whitaker,Ekaterina Badaeva,William K. Liu,Xiaosong Li,Daniel R. Gamelin +6 more
TL;DR: A large, reversible, room-temperature magnetic response to charge state in free-standing colloidal ZnO nanocrystals doped with Mn(2+) ions is observed.
Journal ArticleDOI
Orbital pathways for Mn 2 + -carrier s p − d exchange in diluted magnetic semiconductor quantum dots
TL;DR: In this article, a combination of density functional theory (DFT) and perturbation theory calculations was used to identify the dominant orbital pathways responsible for Mn{}^{2+}$-carrier exchange.