Coherent effects in magneto-transport through Zeeman split levels

Abstract

We study non-equilibrium electronic transport through a quantum dot or impurity weakly coupled to ferromagnetic leads. Based on the rate equation formalism we derive noise spectra for the transport current. We show that due to quantum interference between different spin components of the current the spectrum develops a peak or a dip at the frequency corresponding to Zeeman splitting in the quantum dot. The detailed analysis of the spectral structure of the current is carried out for noninteracting electrons as well as in the regime of Coulomb blockade.

25 pages, Presentation is improved, Phys. Rev. B, in press

References in corpus (15)

• Shot Noise in Mesoscopic Conductors
• Microscopic derivation of rate equations for quantum transport
• Theory of Transport through Quantum-Dot Spin Valves in the Weak-Coupling Regime
• Rate equations for quantum transport in multi-dot systems
• Tunnel magnetoresistance of quantum dots coupled to ferromagnetic leads in the sequential and cotunneling regimes
• Shot Noise Spectrum of Open Dissipative Quantum Two-level Systems
• Rate equations for Coulomb blockade with ferromagnetic leads
• Using single quantum states as spin filters to study spin polarization in ferromagnets
• Interference effects in resonant magneto-transport
• Shot noise in coupled dots and the "fractional charges"
• Coulomb Promotion of Spin-Dependent Tunnelling
• Non-collinear magnetoconductance of a quantum dot
• Quantum interference in resonant tunneling and single spin measurements
• Spin current through a tunnel junction
• Two-potential approach to multi-dimensional tunneling

Cited by in corpus (29)

• Molecular Transport Junctions: Vibrational Effects
• Quantum master equation for electron transport through quantum dots and single molecules
• Spin effects in single electron tunneling
• Inelastic effects in molecular junctions in the Coulomb and Kondo regimes: Nonequilibrium equation-of-motion approach
• Frequency-Dependent Current Noise through Quantum-Dot Spin Valves
• Calculation of the current noise spectrum in mesoscopic transport: an efficient quantum master equation approach
• Geometrical effects and signal delay in time-dependent transport at the nanoscale
• The electron transport through a quantum dot in the Coulomb blockade regime: Non-equilibrium Green's functions based model
• Quantum mechanical approach to decoherence and relaxation generated by fluctuating environment
• Spin Dynamics in a Tunnel Junction between Ferromagnets
• Steps and dips in the ac conductance and noise of mesoscopic structures
• Dynamics of coherences in the interacting double-dot Aharonov-Bohm interferometer: Exact numerical simulations
• Spin-Dependent Ringing and Beats in a Quantum Dot System
• Retrieving qubit information despite decoherence
• Interference through quantum dots
• Magnetic field switching in parallel quantum dots
• Theory of a Magnetically-Controlled Quantum-Dot Spin Transistor
• Finite-frequency current (shot) noise in coherent resonant tunneling through a coupled-quantum-dot interferometer
• A model for the ESR-STM phenomenon
• Single-electron approach for time-dependent electron transport
• Current-oscillator correlation and Fano factor spectrum of quantum shuttle with finite bias voltage and temperature
• Double Quantum Dot scenario for spin resonance in current noise
• Spin-dependent current noises in transport through coupled quantum dots
• Dephasing of electrons in the Aharonov-Bohm interferometer with a single-molecular vibrational junction
• Nanoscopic interferometer model for spin resonance in current noise
• Renormalized dynamics in charge qubit measurements by a single electron transistor
• Shot noise of charge and spin transport in a junction with a precessing molecular spin
• Three-Dimensional Approach Applied to Quasi-stationary States of Deformed $\alpha$-Emitters
• Influence of superconducting leads energy gap on electron transport through double quantum dot by Markovian quantum master equation approach