Tunable Exchange Interaction in Quantum Dot Devices
arXiv:cond-mat/0404607 · doi:10.1143/JJAP.43.L691
Abstract
We theoretically discuss the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between semiconductor quantum dots (QDs). When each QD having a local spin is coupled to the conduction electrons in semiconductors, an indirect exchange interaction, i.e., the RKKY interaction, is induced between two local spins. The RKKY interaction between QDs, which is mediated by the Fermi sea in semiconductors, is modulated by changing the Fermi energy, and the magnitude or even the sign of the exchange interaction can be tuned, which leads to a tunable magnetic transition in QD devices. We estimate the magnitude of the RKKY interaction in QDs as a function of the electron density and the inter-dot distance.
References in corpus (6)
- Kondo Physics in a Single Electron Transistor
- A Tunable Kondo Effect in Quantum Dots
- The Kondo Effect in the Unitary Limit
- Flat-band ferromagnetism in quantum dot superlattices
- Design of a semiconductor ferromagnet in a quantum dot artificial crystal
- Electron transport and energy relaxation in dilute magnetic alloys
Cited by in corpus (8)
- Decoherence of localized spins interacting via RKKY interaction
- Quantum storage in quantum ferromagnets
- Non-local Control of the Kondo Effect in a Double Quantum Dot-Quantum Wire Coupled System
- Kondo Quantum Dots and the Novel Kondo-doublet interaction
- Tunable Kondo screening in a quantum dot device
- Electric field control of the indirect magnetic coupling through a short graphene nanoribbon
- Computing spectral bounds of the Heisenberg ferromagnet from geometric considerations
- Low-temperature magnetic properties of the Kondo lattice model in one dimension