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Updated: Jul 19, 2026
14:58
Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
Published on: June 3, 2015
Electrical control of a single Mn atom in a quantum dot.
Y Léger1, L Besombes, J Fernández-Rossier
1CEA-CNRS group Nanophysique et Semiconducteurs, Laboratoire de Spectrométrie Physique, CNRS and Université Joseph Fourier-Grenoble 1, Boîte Postale 87, F-38402 St. Martin d'Hères, France.
Physical Review Letters
|October 10, 2006
Summary
We demonstrate electrical control over a single manganese atom
Area of Science:
- Quantum dots
- Spintronics
- Atomic magnetism
Background:
- Quantum dots are semiconductor nanocrystals with tunable electronic properties.
- Controlling the magnetic properties of individual atoms is crucial for quantum computing and spintronics.
Purpose of the Study:
- To investigate the reversible electrical control of magnetic properties in a single manganese atom within a quantum dot.
- To explore how different charge states of the quantum dot affect the atom's spin behavior.
Main Methods:
- Fabrication of a quantum dot device housing a single manganese atom.
- Utilizing photoluminescence spectroscopy to probe spin properties.
- Electrically tuning the charge state of the quantum dot to 0, +1e, and -1e.
Main Results:
- The neutral quantum dot exhibits paramagnetic behavior.
- Electron-doped quantum dots show spin states that are invariant under spin rotation.
- Hole-doped quantum dots display spin states quantized along the growth direction.
Conclusions:
- Electrical control over the magnetic properties of a single Mn atom in a quantum dot is achievable.
- The charge state of the quantum dot significantly influences the spin properties of the embedded Mn atom.
- This work opens avenues for novel spintronic devices and quantum information processing.
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