Tailoring Magnetism in Quantum Dots

Abstract

We study magnetism in magnetically doped quantum dots as a function of confining potential, particle numbers, temperature, and strength of Coulomb interactions. We explore possibility of tailoring magnetism by controlling the electron-electron Coulomb interaction, without changing the number of particles. The interplay of strong Coulomb interactions and quantum confinement leads to enhanced inhomogeneous magnetization which persist at higher temperatures than in the non-interacting case. The temperature of the onset of magnetization can be controlled by changing the number of particles as well as by modifying the quantum confinement and the strength of Coulomb interactions. We predict a series of electronic spin transitions which arise from the competition between the many-body gap and magnetic thermal fluctuations.

5 pages, 4 figures

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• Tailoring ferromagnetic chalcopyrites
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Cited by in corpus (24)

• Semiconductor Spintronics
• Spin-polarized Mn${}^{2+}$ emission from Manganese-doped colloidal nanocrystals
• Magnetic field dependence of the many-electron states in a magnetic quantum dot: The ferromagnetic-antiferromagnetic transition
• Robust Magnetic Polarons in Type-II (Zn,Mn)Te Quantum Dots
• Magnetic polaron formation and exciton spin relaxation in single CdMnTe quantum dots
• Piezomagnetic Quantum Dots
• Direct Measurements of Magnetic Polarons in Cd${}_{1-x}$Mn${}_x$Se Nanocrystals from Resonant Photoluminescence
• Single exciton spectroscopy of single-Mn doped InAs quantum dots
• Magnetism in Closed-shell Quantum Dots: Emergence of Magnetic Bipolarons
• Electronic States of Magnetic Quantum Dots
• Localized magnetic states in Rashba dots
• Time-resolved magnetophotoluminescence studies of magnetic polaron dynamics in type-II quantum dots
• Influence of exciton spin relaxation on the photoluminescence spectra of semimagnetic quantum dots
• Spin ordering in magnetic quantum dots: From core-halo to Wigner molecules
• Reentrant Formation of Magnetic Polarons in Quantum Dots
• Spin textures in strongly coupled electron spin and magnetic or nuclear spin systems in quantum dots
• Spin-orbit coupled particle in a spin bath
• Para-ortho transition of artificial H${}_2$ molecule in lateral quantum dots doped with magnetic impurities
• Magnetic ordering in quantum dots: Open vs. closed shells
• Exposure of the Hidden Anti-Ferromagnetism in Paramagnetic CdSe:Mn Nanocrystals
• Optical orientation in bipolar spintronic devices
• Multiband Electronic Structure of Magnetic Quantum Dots: Numerical Studies
• Dynamical Magnetic and Nuclear Polarization in Complex Spin Systems: Semi-magnetic II-VI Quantum Dots
• Performance engineering of semiconductor spin qubit systems