Indirect Exchange Interaction between two Quantum Dots in an Aharonov-Bohm Ring
arXiv:cond-mat/0310168 · doi:10.1103/PhysRevB.69.155320
Abstract
We investigate the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between two spins located at two quantum dots embedded in an Aharonov-Bohm (AB) ring. In such a system the RKKY interaction, which oscillates as a function of the distance between two local spins, is affected by the flux. For the case of the ferromagnetic RKKY interaction, we find that the amplitude of AB oscillations is enhanced by the Kondo correlations and an additional maximum appears at half flux, where the interaction is switched off. For the case of the antiferromagnetic RKKY interaction, we find that the phase of AB oscillations is shifted by pi, which is attributed to the formation of a singlet state between two spins for the flux value close to integer value of flux.
10 pages, 5 figures
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Cited by in corpus (16)
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- Interference Effects on Kondo-Assisted Transport through Double Quantum Dots
- Probing spin and orbital Kondo effects with a mesoscopic interferometer
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- Quantum phase transitions in the systems of parallel quantum dots
- Interference effects in the counting statistics of electron transfers through a double quantum dot
- Tunable Spin Qubit Coupling Mediated by a Multi-Electron Quantum Dot
- Decoherence of localized spins interacting via RKKY interaction
- Tunable Kondo screening in a quantum dot device
- Numerical study of finite size effects in the one-dimensional two-impurity Anderson model
- Ruderman-Kittel-Kasuya-Yosida spin density oscillations: impact of the finite radius of the exchange interaction
- Aharonov-Bohm Effect for Parallel and T-shaped Double Quantum Dots
- Two impurity Kondo problem under Aharonov--Bohm and Aharonov--Casher Effects
- Transport Properties of Multiple Quantum Dots Arranged in Parallel: Results from the Bethe Ansatz
- Mass modification of itinerant carriers in RKKY oscillations induced by finite range exchange interactions
- Sensitivity of the magnetic state of a spin lattice on itinerant electron orbital phase