Double quantum dot as a spin rotator

Abstract

It is shown that the low-energy spin states of double quantum dots (DQD) with even electron occupation number $N$ possess the symmetry SO(4) similar to that of a rigid rotator familiar in quantum mechanics (rotational spectra of H${}_2$ molecule, electron in Coulomb field, etc). The "hidden symmetry" of the rotator manifests itself in the tunneling properties of the DQD. In particular, the Kondo resonance may arise under asymmetric gate voltage in spite of the even electron occupation of the DQD. Various symmetry properties of spin rotator in the context of the Kondo effect are discussed and experimental realization of this unusual scenario is proposed.

15 two-column pages

References in corpus (2)

• Kondo effect induced by a magnetic field
• Mean Field Theory of the Kondo Effect in Quantum Dots with an Even Number of Electrons

Cited by in corpus (31)

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• Magnetically Tunable Kondo - Aharonov-Bohm Effect in a Triangular Quantum Dot
• Tunneling through triple quantum dots with mirror symmetry
• Renormalization group study of capacitively coupled double quantum dots
• Low-energy physics of three-orbital impurity model with Kanamori interaction
• Dynamical symmetries in Kondo tunneling through complex quantum dots
• Electron Transport through T-Shaped Double-Dots System
• Resonance Kondo Tunneling through a Double Quantum Dot at Finite Bias
• Kondo effect in systems with dynamical symmetries
• Tunneling transport through multi-electrons states in coupled quantum dots with Coulomb correlations
• Kondo Effect in Multiple-Dot Systems
• Charge trapping in the system of interacting quantum dots
• Charge and spin configurations in the coupled quantum dots with Coulomb correlations induced by tunneling current
• Spin quadrupoletronics: moving spin anisotropy around
• Kondo Shuttling in Nanoelectromechanical Single-Electron Transistor
• Vibration-induced Kondo tunneling through metal-organic complexes with even electron occupation number
• Semi-fermionic representation for spin systems under equilibrium and non-equilibrium conditions
• SU(12) Kondo Effect in Carbon Nanotube Quantum Dot
• Swapping entangled Kondo resonances in parallel-coupled double quantum dots
• Dynamical and point symmetry of the Kondo effect in triangular quantum dot
• Decoherence and Dephasing in Kondo Tunneling through Double Quantum Dots
• Electronic spin working mechanically
• Centipede ladder at quarter filling
• Two channel orbital Kondo effect in quantum dot with SO(n) symmetry
• Magnetic field induced two-channel Kondo effect in multiple quantum dots
• External field induced switching of tunneling current in the coupled quantum dots
• Kondo Tunneling into a Quantum Spin Hall Insulator
• Time evolution of an entangled initial state in coupled quantum dots with Coulomb correlations
• Non-stationary effects in the system of coupled quantum dots influenced by the Coulomb correlations
• Kondo effect in Complex Quantum Dots in the presence of an oscillating and fluctuating gate signal
• Phonon-assisted and magnetic field induced Kondo tunneling in single molecular devices