Spin-polarized ballistic conduction through correlated Au-NiMnSb-Au heterostructures

Abstract

We examine the ballistic conduction through Au-NiMnSb-Au heterostructures consisting of up to four units of NiMnSb in the scattering region. We investigate the dependence of the transmission function computed within the local spin density approximation (LSDA) of the density functional theory (DFT) on the number of half-metallic units in the scattering region. For a single NiMnSb unit the transmission function displays a spin polarization of around 50 % in a window of 1 eV centered around the Fermi level. By increasing the number of layers an almost complete spin polarization of the transmission is obtained in the same energy window. Supplementing the DFT-LSDA calculations with local electronic interactions, of Hubbard-type on the Mn sites, leads to a hybridization between the interface and many-body states. The significant reduction of the spin polarization seen in the density of states is not apparent in the spin-polarization of the conduction electron transmission, which suggests the localized nature of the hybridized interface and many-body induced states.

arXiv comment25 pages, 6 figures

References in corpus (34)

• The SIESTA method for ab initio order-N materials simulation
• Efficient index handling of multidimensional periodic boundary conditions
• Electronic Structure Calculations with Dynamical Mean-Field Theory: A Spectral Density Functional Approach
• Half-metallic ferromagnets: From band structure to many-body effects
• Origin and Properties of the Gap in the Half-Ferromagnetic Heusler Alloys
• Ab initio calculations of quasiparticle band structure in correlated systems: LDA++ approach
• Muffin Tin Orbitals of Arbitrary Order
• Correlated metals and the LDA+U method
• Surface Properties of the Half- and Full-Heusler Alloys
• Thermal collapse of spin-polarization in half-metallic ferromagnets
• The effect of the spin-orbit interaction on the band gap of half-metals
• Electronic structure and magnetic properties of correlated metals: A local self-consistent perturbation scheme
• Charge self-consistent dynamical mean-field theory based on the full-potential linear muffin-tin orbital method: methodology and applications
• LDA++ approach to electronic structure of magnets: correlation effects in iron
• Non-quasiparticle states in Co${}_2$MnSi evidenced through magnetic tunnel junction spectroscopy measurements
• Nonquasiparticle states in half-metallic ferromagnet NiMnSb
• Electron Correlations and the Minority-Spin Band Gap in Half-Metallic Heusler Alloys
• Resonant electronic states and I-V curves of Fe/MgO/Fe(100) tunnel junctions
• Ab initio electronic structure calculation of correlated systems: EMTO-DMFT approach
• Transmission Probability for Interacting Electrons Connected to Reservoirs
• Coexistance of giant tunneling electroresistance and magnetoresistance in an all-oxide magnetic tunnel junction
• Structural and magnetic properties of the (001) and (111) surfaces of the half-metal NiMnSb
• Model Hamiltonian parameters for half-metallic ferromagnets NiMnSb and CrO2
• Tunable spin transport in CrAs: role of correlation effects
• Half-metallic ferromagnetism induced by dynamic electron correlations in VAs
• Electronic structure and magnetic properties of metallocene multiple-decker sandwich nanowires
• Half-metallicity in NiMnSb: a Variational Cluster Approach with ab-initio parameters
• Majority-spin non-quasiparticle states in half-metallic ferrimagnet Mn${}_2$VAl
• Spin-polarized scanning tunneling microscopy of half-metallic ferromagnets: Non-quasiparticle contributions
• Transmission through correlated Cu${}_n$CoCu${}_n$ heterostructures
• One particle spectral function and analytic continuation for many-body implementation in the EMTO method
• Electronic correlations in short period (CrAs)${}_n$/(GaAs)${}_n$ ferromagnetic heterostructures
• Absence of halfmetallicity in defect-free Cr, Mn-delta-doped Digital Magnetic Heterostructures
• Non-quasiparticle states in the core level spectra of ferromagnetic semiconductors and half-metallic ferromagnets

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