Fingerprints of the Magnetic Polaron in Nonequilibrium Electron Transport through a Quantum Wire Coupled to a Ferromagnetic Spin Chain

Abstract

We study nonequilibrium quantum transport through a mesoscopic wire coupled via local exchange to a ferromagnetic spin chain. Using the Keldysh formalism in the self-consistent Born approximation, we identify fingerprints of the magnetic polaron state formed by hybridization of electronic and magnon states. Because of its low decoherence rate, we find coherent transport signals. Both elastic and inelastic peaks of the differential conductance are discussed as a function of external magnetic fields, the polarization of the leads and the electronic level spacing of the wire.

arXiv comment5 pages, 4 figures

References in corpus (5)

• Spintronics: Fundamentals and applications
• Magnetization transport and quantized spin conductance
• Evidence of spontaneous spin polarized transport in magnetic nanowires
• Resonant electron transmission through a finite quantum spin chain
• Magnon transport and spin current switching through quantum dots

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• Lattice Green's function approach to the solution of the spectrum of an array of quantum dots and its linear conductance
• Coulomb interaction effects and electron spin relaxation in the 1d Kondo lattice model