Tunable Kondo screening in a quantum dot device

Abstract

We consider electron transport along a single-mode channel which is in contact, via tunnel junctions in its walls, with two quantum dots. Electron tunneling to and from the dots contributes to the electron backscattering, and thus modifies the channel conductance. If the dots carry spin, the channel conductance becomes temperature dependent due to the Kondo effect. The two-dot device geometry allows for a formation of S=1 localized spin due to the indirect exchange interaction, called Ruderman-Kittel-Kasuya-Yosida interaction. This device offers a possibility to study the crossover between fully screened and under-screened Kondo impurity. We investigate the manifestation of such crossover in the channel conductance.

References in corpus (22)

• The Kondo Effect in the Unitary Limit
• Kondo physics in carbon nanotubes
• Kondo effect in an integer-spin quantum dot
• Tunable Non-local Spin Control in a Coupled Quantum Dot System
• Fano Resonance in a Quantum Wire with a Side-coupled Quantum Dot
• Kondo effect in real quantum dots
• Optical RKKY Interaction between Charged Semiconductor Quantum Dots
• Two-stage Kondo effect in a quantum dot at high magnetic field
• Quantum Phase Transition in a Multi-Level Dot
• Enhancement of Kondo effect in quantum dots with an even number of electrons
• Quantum phase transitions in models of coupled magnetic impurities
• Anti-Kondo resonance in transport through a quantum wire with a side-coupled quantum dot
• Conduction through a quantum dot near a singlet-triplet transition
• RKKY and magnetic field interactions in coupled Kondo quantum dots
• Singlet-triplet transition in a single-electron transistor at zero magnetic field
• Kondo effect induced by a magnetic field
• Kondo tunneling through real and artificial molecules
• Transport spectroscopy of Kondo quantum dots coupled by RKKY interaction
• Singular conductance of a spin 1 quantum dot
• Indirect Exchange Interaction between two Quantum Dots in an Aharonov-Bohm Ring
• Tunable Exchange Interaction in Quantum Dot Devices
• Tuning the Non-local Spin-Spin Interaction between Quantum Dots with a Magnetic Field

Cited by in corpus (11)

• Multi-impurity Anderson model for quantum dots coupled in parallel
• Quantum phase transitions in the systems of parallel quantum dots
• Kondo and Dicke effect in quantum-dots side coupled to a quantum wire
• Fano-Kondo effect through two-level system based on quantum dots
• Non-local Control of the Kondo Effect in a Double Quantum Dot-Quantum Wire Coupled System
• Kondo effects and shot noise enhancement in a laterally coupled double quantum dot
• Non-local control of spin-spin correlation in finite geometry helical edge
• Ruderman-Kittel-Kasuya-Yosida spin density oscillations: impact of the finite radius of the exchange interaction
• Fano-Kondo effect in a two-level system with triple quantum dots: shot noise characteristics
• Underscreened Kondo impurities in a Luttinger liquid
• Mass modification of itinerant carriers in RKKY oscillations induced by finite range exchange interactions