# Transport through single-level systems: Spin dynamics in the nonadiabatic regime

@article{Metelmann2012TransportTS, title={Transport through single-level systems: Spin dynamics in the nonadiabatic regime}, author={Anja Metelmann and Tobias Brandes}, journal={Physical Review B}, year={2012}, volume={86}, pages={245317} }

We investigate the Fano-Anderson model coupled to a large ensemble of spins under the influence of an external magnetic field. The interaction between the two spin systems is treated within a meanfield-approach and we assume an anisotropic coupling between these two systems. By using a nonadiabatic approach, we make no further approximations in the theoretical description of our system, apart from the semiclassical treatment. Therewith, we can include the short-time dynamics as well as the…

## Figures from this paper

## 5 Citations

Electron transport in nanoscale junctions with local anharmonic modes.

- PhysicsThe Journal of chemical physics
- 2014

It is shown that the analog of the Franck-Condon blockade physics is missing in the spin-fermion model, and the mean-field analysis of the Anderson-Holstein model suggests that nonlinear functionalities, bistability and hysteresis may develop.

Dynamics of Magnetic Molecules under Electrical Control

- Physics
- 2019

This thesis theoretically studies the dynamics of molecular magnets under electrical control. Molecular magnets are nanoscale magnets that can, e.g., consist of single-molecules or single-atoms. In…

Semi-classical generalized Langevin equation for equilibrium and nonequilibrium molecular dynamics simulation

- PhysicsProgress in Surface Science
- 2019

Dynamical exchange and phase induced switching of a localized molecular spin

- PhysicsPhysical Review B
- 2018

We address the dynamics of a localized molecular spin under the influence of external voltage pulses using a generalized spin equation of motion which incorporates anisotropic fields, nonequilibriu…

## References

SHOWING 1-10 OF 41 REFERENCES

Spin effects in transport through single-molecule magnets in the sequential and cotunneling regimes

- Physics
- 2009

We analyze the stationary spin-dependent transport through a single-molecule magnet weakly coupled to external ferromagnetic leads. Using the real-time diagrammatic technique, we calculate the…

Transport and semiclassical dynamics of coupled quantum dots interacting with a local magnetic moment

- Physics
- 2012

We present a theory of magnetotransport through a system of two coupled electronic orbitals, where the electron spin interacts with a (large) local magnetic moment via an exchange interaction. For…

Electron transport through a parallel double-dot system in the presence of Aharonov-Bohm flux and phonon scattering

- Physics
- 2002

We examine the transport and microwave properties of the tunnel-coupled double-dot structure with parallel arrangement between leads in the presence of Aharonov-Bohm magnetic flux. The nonequilibrium…

Phase transitions in dissipative quantum transport and mesoscopic nuclear spin pumping

- Physics
- 2010

Topological phase transitions can occur in the dissipative dynamics of a quantum system when the ratio of matrix elements for competing transport channels is varied. Here we establish a relation…

Adiabaticity in semiclassical nanoelectromechanical systems

- Physics
- 2011

We compare the semiclassical description of NEMS within and beyond the adiabatic approximation. We consider a NEMS model which contains a single phonon (oscillator) mode linearly coupled to an…

Semiclassical dynamics of nanoelectromechanical systems

- Physics
- 2010

We investigate the dynamics of a single phonon (oscillator) mode linearly coupled to an electronic few-level system in contact with external particle reservoirs (leads). A stationary electronic…

Keldysh technique and non-linear σ-model: basic principles and applications

- Physics
- 2009

The purpose of this review is to provide a comprehensive pedagogical introduction into Keldysh technique for interacting out-of-equilibrium fermionic and bosonic systems. The emphasis is placed on a…

Limit cycles and chaos in the current through a quantum dot

- Physics
- 2012

We investigate nonlinear magnetotransport through a single-level quantum dot coupled to ferromagnetic leads, where the electron spin is coupled to a large, external (pseudo)spin via an anisotropic…

Nuclear spins in nanostructures

- Physics
- 2009

We review recent theoretical and experimental advances toward understanding the effects of nuclear spins in confined nanostructures. These systems, which include quantum dots, defect centers, and…

Tunnel magnetoresistance of quantum dots coupled to ferromagnetic leads in the sequential and cotunneling regimes

- Physics
- 2005

We study electronic transport through quantum dots weakly coupled to ferromagnetic leads with collinear magnetization directions. Tunneling contributions of first and second order in the…