Dicke-like effect in spin-polarized transport through coupled quantum dots

Abstract

Spin-dependent electronic transport through a quantum dot side-coupled to two quantum dots and attached to ferromagnetic leads with collinear (parallel and antiparallel) magnetizations is analyzed theoretically. The intra-dot Coulomb correlations are taken into account, whereas the inter-dot ones are neglected. Transport characteristics, i.e. conductance and tunnel magnetoresistance associated with the magnetization rotation from parallel to antiparallel configurations, are calculated by the noneqiulibrium Green function technique. The Green functions are derived by the equation of motion method in the Hartree-Fock approximation. The conductance spectra are shown to reveal features similar to the Dicke resonance in atomic physics.

6 pages, 5 figures

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Cited by in corpus (7)

• Kondo-Dicke resonances in electronic transport through triple quantum dots
• The role of the indirect tunneling processes and asymmetry in couplings in orbital Kondo transport through double quantum dots
• Spin-orbital and spin Kondo effects in parallel coupled quantum dots
• Spin-dependent thermoelectric properties of a Kondo-correlated quantum dot with Rashba spin-orbit coupling
• Interplay between electron pairing and Dicke effect in triple quantum dots structures
• A non-equilibrium equation-of-motion approach to quantum transport utilizing projection operators
• The tunnel magnetoresistance in chains of quantum dots weakly coupled to external leads