Polarized Magnetic Wire Induced by Tunneling Through a Magnetic Impurity

Abstract

Using the zero mode method we compute the conductance of a wire consisting of a magnetic impurity coupled to two Luttinger liquid leads characterized by the Luttinger exponent $\alpha (\le 1)$. We find for resonance conditions, in which the Fermi energy of the leads is close to a single particle energy of the impurity, the conductance as a function of temperature is $G\sim \frac{e^2}{h}(T/T_F{)}^{2(\alpha -2)}$, whereas for off-resonance conditions the conductance is $G\sim \frac{e^2}{h}(T/T_F{)}^{2(\alpha -1)}$. By applying a gate voltage and/or a magnetic field, one of the spin components can be in resonance while the other is off-resonance causing a strong asymmetry between the spin-up and spin-down conductances.

arXiv comment8 pages, submitted to PRL

References in corpus (7)

• Kondo Physics in a Single Electron Transistor
• Possible Spin Polarization in a One-Dimensional Electron Gas
• Density dependent spin polarisation in ultra low-disorder quantum wires
• Transport of a Luttinger liquid in the presence of a time dependent impurity
• Resonant electron transmission through a finite quantum spin chain
• Tunnel magnetoresistance and interfacial electronic state
• Tunnelling of Polarized Electrons in Magnetic Wires

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• Spin-charge mixing effects on resonant tunneling in a polarized Luttinger Liquid
• Spin-filtering by field dependent resonant tunneling
• The Andreev crossed reflection -a Majorana path integral approach
• Topological Insulators,Weyl Semimetals and Topological Superconductors A Transport View