Tuning the Non-local Spin-Spin Interaction between Quantum Dots with a Magnetic Field
arXiv:cond-mat/0407081 · doi:10.1103/PhysRevLett.94.036803
Abstract
We describe a device where the non-local spin-spin interaction between two quantum dots can be turned on and off and even changed sign with a very small magnetic field. The setup consists of two quantum dots at the edge of two two-dimensional electron gases (2DEGs). The quantum dots' spins are coupled through a RKKY-like interaction mediated by the electrons in the 2DEGs. A small magnetic field perpendicular to the plane of the 2DEG is used as a tuning parameter. When the cyclotron radius is commensurate with the interdot distance, the spin-spin interaction is amplified by a few orders of magnitude. The sign of the interaction is controlled by finely tuning the magnetic field. Our setup allows for several dots to be coupled in a linear arrangement and it is not restricted to nearest-neighbors interaction.
4 pages, 5 figures. Published version
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Cited by in corpus (12)
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- Quantum Entanglement in the Two Impurity Kondo Model
- Interplay between Josephson effect and magnetic interactions in double quantum dots
- Electrically-controllable RKKY interaction in semiconductor quantum wires
- Kondo Quantum Dots and the Novel Kondo-doublet interaction
- Tunable Kondo screening in a quantum dot device
- Non-local control of spin-spin correlation in finite geometry helical edge
- RKKY interaction in one-dimensional flat-band lattices
- Design and control of spin gates in two quantum dots arrays
- RKKY interaction in helical higher-order topological insulators
- The two-impurity Kondo model with spin-orbit interactions
- Sensitivity of the magnetic state of a spin lattice on itinerant electron orbital phase