Positive current noise cross-correlations in capacitively coupled double quantum dots with ferromagnetic leads

Abstract

We examine cross-correlations (CCs) in the tunneling currents through two parallel interacting quantum dots coupled to four independent ferromagnetic electrodes. We find that when either one of the two circuits is in the parallel configuration with sufficiently strong polarization strength, a new mechanism of dynamical spin blockade, i.e., a spin-dependent bunching of tunneling events, governs transport through the system together with the inter-dot Coulomb interaction, leading to a sign-reversal of the zero-frequency current CC in the dynamical channel blockade regime, and to enhancement of positive current CC in the dynamical channel anti-blockade regimes, in contrast to the corresponding results for the case of paramagnetic leads.

9 pages, 3 figures

References in corpus (4)

• Electric-field controlled spin reversal in a quantum dot with ferromagnetic contacts
• Tunable Noise Cross-Correlations in a Double Quantum Dot
• Kondo effect in a semiconductor quantum dot coupled to ferromagnetic electrodes
• Mesoscopic versus Macroscopic division of current fluctuations

Cited by in corpus (6)

• Mesoscopic Coulomb drag, broken detailed balance and fluctuation relations
• Current cross-correlations in double quantum dot based Cooper pair splitters with ferromagnetic leads
• Cross-correlations in a quantum dot Cooper pair splitter with ferromagnetic leads
• Statistical correlations of currents flowing via proximized quantum dot
• Full counting statistics of Kondo-type tunneling in a quantum dot: the fluctuation effect of Slave-Boson field
• Finite-frequency noise, Fano factor, $\Delta T$-noise and cross-correlations in double quantum dots