Tunable Kondo effect in a single donor atom
arXiv:0909.5602 · doi:10.1021/nl9031132
Abstract
The Kondo effect has been observed in a single gate-tunable atom. The measurement device consists of a single As dopant incorporated in a Silicon nanostructure. The atomic orbitals of the dopant are tunable by the gate electric field. When they are tuned such that the ground state of the atomic system becomes a (nearly) degenerate superposition of two of the Silicon valleys, an exotic and hitherto unobserved valley Kondo effect appears. Together with the regular spin Kondo, the tunable valley Kondo effect allows for reversible electrical control over the symmetry of the Kondo ground state from an SU(2)- to an SU(4) -configuration.
10 pages, 8 figures
References in corpus (8)
- Orbital Kondo effect in carbon nanotubes
- Quantum phase transition in a single-molecule quantum dot
- Transport spectroscopy of a single dopant in a gated silicon nanowire
- Nonequilibrium Singlet-Triplet Kondo Effect in Carbon Nanotubes
- Electronic excitations of a single molecule contacted in a three-terminal configuration
- Kondo Effects in Carbon Nanotubes: From SU(4) to SU(2) symmetry
- Background charges and quantum effects in quantum dots transport spectroscopy
- Coulomb blockade and Kondo effect in a few-electron silicon/silicon-germanium quantum dot
Cited by in corpus (18)
- Silicon Quantum Electronics
- Electronic and magnetic properties of molecule-metal interfaces: transition metal phthalocyanines adsorbed on Ag(100)
- Observation of the SU(4) Kondo state in a double quantum dot
- Magnetic Field Probing of an SU(4) Kondo Resonance in a Single Atom Transistor
- The Kondo Temperature of SU(4) Symmetric Quantum Dots
- Beating the thermal limit of qubit initialization with a Bayesian Maxwell's demon
- 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
- Inelastic electron tunneling spectroscopy of a single nuclear spin
- Control of the ionization state of 3 single donor atoms in silicon
- Phase-Coherent Dynamics of Quantum Devices With Local Interactions
- Coherent transport through a double donor system in silicon
- Width of the charge-transfer peak in the SU(N) impurity Anderson model and its relevance to non-equilibrium transport
- Non-local coupling of two donor-bound electrons
- Quantum read-out and fast initialization of nuclear spin qubits with electric currents
- Selective tuning of spin-orbital Kondo contributions in parallel-coupled quantum dots
- Probing a Single Nuclear Spin in a Silicon Single Electron Transistor
- Local Kondo temperatures in atomic chains