Beating in electronic transport through quantum dot based devices

Abstract

Electronic transport through a two-level system driven by external electric field and coupled to (magnetic or non-magnetic) electron reservoirs is considered theoretically. The basic transport characteristics such as current and tunnel magnetoresistance (TMR) are calculated in the weak coupling approximation by the use of rate equation connected with Green function formalism and slave-boson approach. The time dependent phenomenon is considered in the gradient expansion approximation. The results show that coherent beats pattern can be observed both in current and TMR. The proposed system consisting of two quantum dots attached to external leads, in which the dots' levels can be tuned independently, can be realized experimentally to test this well known physical phenomenon. Finally, we also indicate possible practical applications of such device.

9 pages, 9 figures

References in corpus (11)

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• Spin-echo of a single electron spin in a quantum dot
• Optical control of spin coherence in singly charged (In,Ga)As/GaAs quantum dots
• Ballistic Spin Resonance
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• Time-dependent quantum transport with superconducting leads: a discrete basis Kohn-Sham formulation and propagation scheme
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• Adiabatic Charge Pumping through Quantum Dots in the Coulomb Blockade Regime
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Cited by in corpus (6)

• Transient probing of the symmetry and the asymmetry of electron interference
• Enhanced photon-assisted spin transport in a quantum dot attached to ferromagnetic leads
• Lindblad Formalism based on Fermion-to-Qubit mapping for Non-equilibrium Open-Quantum Systems
• Spin-dependent beating patterns in thermoelectric properties: Filtering the carriers of the heat flux in a Kondo adatom system
• The influence of spin-flip scattering on the preparation and detection of a single spin state in a quantum dot attached to a spin battery
• Dimensionality effects in the LDOS of ferromagnetic hosts probed via STM: spin-polarized quantum beats and spin filtering