Spin-polarized currents through interacting quantum wires with nonmagnetic leads

Abstract

We study the performance of a quantum wire spin filter that is based on the Rashba spin-orbit interaction in the presence of the electron-electron interaction. The finite length wire is attached to two semi-infinite nonmagnetic leads. Analyzing the spin polarization of the linear conductance at zero temperature, we show that spin-filtering is possible by adequate tuning of the system parameters first considering noninteracting electrons. Next, the functional renormalization group method is used to capture correlation effects induced by the Coulomb interaction. For short wires we show that the energy regime in which spin polarization is found is strongly affected by the Coulomb interaction. For long wires we find the power-law suppression of the total conductance on low energy scales typical for inhomogeneous Luttinger liquids while the degree of spin polarization stays constant.

References in corpus (15)

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• Transmission Probability for Interacting Electrons Connected to Reservoirs
• Rashba spin splitting in quantum wires
• Renormalization-group analysis of the one-dimensional extended Hubbard model with a single impurity
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• Influence of the contacts on the conductance of interacting quantum wires
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• Electron-electron interactions in a one-dimensional quantum wire spin filter
• Excess conductance of a spin-filtering quantum dot

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• Spectral properties of Luttinger liquids: A comparative analysis of regular, helical, and spiral Luttinger liquids
• Localization, $\mathcal{P}\mathcal{T}$-Symmetry Breaking and Topological Transitions in non-Hermitian Quasicrystals
• Skin effect and dynamical delocalization in non-Hermitian quasicrystals with spin-orbit interaction
• Spin current generation and detection by a double quantum dot structure
• Effect of spin-orbit interactions on the 0.7 anomaly in quantum point contacts
• Interplay of Coulomb interaction and spin-orbit effects in multi-level quantum dots
• Spin-orbit interaction and asymmetry effects on Kondo ridges at finite magnetic field
• Kondo effect and spin-active scattering in ferromagnet-superconductor junctions
• Self-duality of One-dimensional Quasicrystals with Spin-Orbit Interaction
• Transport through a band insulator with Rashba spin-orbit coupling: metal-insulator transition and spin-filtering effects
• Spin filter for arbitrary spins by substrate engineering
• Theory of spin polarization in mesoscopic spin-orbit coupling systems
• Tunneling spectroscopy between one-dimensional helical conductors
• Effect of spin-orbit coupling in one-dimensional quasicrystals with power-law hopping