Nonequilibrium spin-current detection with a single Kondo impurity

@article{Lim2013NonequilibriumSD,
  title={Nonequilibrium spin-current detection with a single Kondo impurity},
  author={Jong Soo Lim and Rosa L{\'o}pez and Laurent Limot and Pascal Simon},
  journal={Physical Review B},
  year={2013},
  volume={88},
  pages={165403}
}
We present a theoretical study based on the Anderson model of the transport properties of a Kondo impurity (atom or quantum dot) connected to ferromagnetic leads, which can sustain a nonequilibrium spin current. We analyze the case where the spin current is injected by an external source and when it is generated by the voltage bias. Due to the presence of ferromagnetic contacts, a static exchange field is produced that eventually destroys the Kondo correlations. We find that such a field can be… 
12 Citations

Figures from this paper

Out-of-equilibrium Kondo effect in a quantum dot: Interplay of magnetic field and spin accumulation

We present a theoretical study of low-temperature nonequilibrium transport through an interacting quantum dot in the presence of Zeeman magnetic field and current injection into one of its leads. By

Current-induced effective Dzyaloshinskii-Moriya interaction and its Kondo enhancement in double quantum dot.

It is reported that the spin current and the effective DM interaction are enhanced in the Kondo regime and this enhancement occurs because the Kodo resonance, which is supposed to be suppressed by the local ferromagnetic exchange, is enhanced by the inter-dot coupling.

Josephson Current through a Quantum Dot Connected with Superconducting Leads

In this study, we consider the Josephson current in a system composed of a superconductor/quantum dot/superconductor junction. In the model, the Coulomb interaction in the quantum dot is taken into

Kondo Resonance of a Co Atom Exchange Coupled to a Ferromagnetic Tip.

The Kondo effect of a Co atom on Cu(100) was investigated with a low-temperature scanning tunneling microscope using a monoatomically sharp nickel tip and a quantitative analysis of the line shape indicates that the junction spin polarization is weak.

Nonequilibrium Kondo effect in a graphene-coupled quantum dot in the presence of a magnetic field

The graphene-based quantum dot system provides a platform for potential applications of nanoelectronics and finds that the Kondo resonance does not show up in the density of states and in the differential conductance for zero chemical potential due to the linear energy dispersion of graphene.

Nonequilibrium Kondo effect by the equilibrium numerical renormalization group method: The hybrid Anderson model subject to a finite spin bias

We investigate Kondo correlations in a quantum dot with normal and superconducting electrodes, where a spin voltage is applied across the device and the local interaction $U$ is either attractive or

Ultrahigh spin thermopower and pure spin current in a single-molecule magnet

Using the non-equilibrium Green's function (NEGF) formalism within the sequential regime, ultrahigh spin thermopower and pure spin current in single-molecule magnet (SMM) are studied and are useful in fabricating and advantaging SMM devices based on spin caloritronics.

Kondo screening and spin excitation in few-layer CoPc molecular assembly stacking on Pb(111) surface: A DFT+HEOM study.

Calculation results indicate that the local spin properties of CoPc/Pb(111) composites depend critically on the number of adsorption layers, and the DFT+HEOM approach provides a practical means for investigating the local electronic andspin properties of two-dimensional molecular assemblies adsorbed on the metal surface.