Transmission through correlated Cu${}_n$CoCu${}_n$ heterostructures

Abstract

The effects of local electronic interactions and finite temperatures upon the transmission across the Cu${}_4$CoCu${}_4$ metallic heterostructure are studied in a combined density functional and dynamical mean field theory. It is shown that, as the electronic correlations are taken into account via a local but dynamic self-energy, the total transmission at the Fermi level gets reduced (predominantly in the minority spin channel), whereby the spin polarization of the transmission increases. The latter is due to a more significant $d$-electrons contribution, as compared to the non-correlated case in which the transport is dominated by $s$ and $p$ electrons.

29 pages, 7 figures, submited to PRB

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• Dynamical Mean-Field Theory of Strongly Correlated Electron Systems
• Dynamical Mean-Field Theory for spin-dependent electron transport in spin-valve devices
• Analytic continuation-free Green's function approach to correlated electronic structure calculations
• The DFT+${\Sigma }_2$ method for electron correlation effects at transition metal surfaces
• Quantitative comparison of Anderson impurity solvers applied to transport in quantum dots
• Spin-polarized ballistic conduction through correlated Au-NiMnSb-Au heterostructures
• Stability of destructive interference antiresonances in electron transport through graphene nanostructures
• Plane-wave many-body corrections to the conductance in bulk tunnel junctions
• Spin-polarization and resonant states in electronic conduction through a correlated magnetic layer