Magnetic Field Probing of an SU(4) Kondo Resonance in a Single Atom Transistor

Abstract

Semiconductor nano-devices have been scaled to the level that transport can be dominated by a single dopant atom. In the strong coupling case a Kondo effect is observed when one electron is bound to the atom. Here, we report on the spin as well as orbital Kondo ground state. We experimentally as well than theoretically show how we can tune a symmetry transition from a SU(4) ground state, a many body state that forms a spin as well as orbital singlet by virtual exchange with the leads, to a pure SU(2) orbital ground state, as a function of magnetic field. The small size and the s-like orbital symmetry of the ground state of the dopant, make it a model system in which the magnetic field only couples to the spin degree of freedom and allows for observation of this SU(4) to SU(2) transition.

12 pages, 10 figures, accepted for publication in Physical Review Letters

References in corpus (10)

• Orbital Kondo effect in carbon nanotubes
• Transport spectroscopy of a single dopant in a gated silicon nanowire
• Coherent Control of Rydberg States in Silicon
• SU(4) and SU(2) Kondo Effects in Carbon Nanotube Quantum Dots
• Kondo Effects in Carbon Nanotubes: From SU(4) to SU(2) symmetry
• Quantum control of donor electrons at the Si-SiO2 interface
• Single-dopant resonance in a single-electron transistor
• Lifetime enhanced transport in silicon due to spin and valley blockade
• Orbital Kondo effect in double quantum dots
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Cited by in corpus (43)

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• Enhancing of nonlinear thermoelectric response of a correlated quantum dot in the Kondo regime by asymmetrically coupling to the leads
• Nonequilibrium self-energies, Ng approach and heat current of a nanodevice for small bias voltage and temperature
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• Probing the Quantum States of a Single Atom Transistor at Microwave Frequencies
• The Kondo Temperature of SU(4) Symmetric Quantum Dots
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• Nonequilibrium conductance through a benzene molecule in the Kondo regime
• Analysis of low energy response and possible emergent SU(4) Kondo state in a double quantum dot
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• Impact of capacitance and tunneling asymmetries on Coulomb blockade edges and Kondo peaks in non-equilibrium transport through molecular quantum dots
• Spectral evolution of the SU(4) Kondo effect from the single impurity to the two-dimensional lattice
• Photovoltaic Effect of Atomtronics Induced by Artificial Gauge Field
• Relation between width of the zero-bias anomaly and Kondo temperaure in transport measurements through correlated quantum dots: Effect of asymmetric coupling to the leads
• Nonlinear Seebeck effect of SU($N$) Kondo impurity
• Restoring the SU(4) Kondo regime in a double quantum dot system
• Spin-orbital and spin Kondo effects in parallel coupled quantum dots
• Abrupt disappearance and reemergence of the SU(2) and SU(4) Kondo effects due to population inversion
• Valley blockade and multielectron spin-valley Kondo effect in silicon
• Admittance of the SU(2) and SU(4) Anderson quantum RC circuits
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• Phase-Coherent Dynamics of Quantum Devices With Local Interactions
• Two-stage three-channel Kondo physics for an FePc molecule on the Au(111) surface
• Width of the charge-transfer peak in the SU(N) impurity Anderson model and its relevance to non-equilibrium transport
• Destructive quantum interference in transport through molecules with electron-electron and electron-vibration interactions
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• Effects of strong electron interactions and resonance scattering on power output of nano-devices
• SU(4) Kondo entanglement in double quantum dot devices
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• Two channel orbital Kondo effect in quantum dot with SO(n) symmetry
• Role of asymmetry in thermoelectric properties of a double quantum dot out of equilibrium
• Selective tuning of spin-orbital Kondo contributions in parallel-coupled quantum dots
• Signatures of Valley Kondo Effect in Si/SiGe Quantum Dots
• Probing a Single Nuclear Spin in a Silicon Single Electron Transistor