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

2006/03/31 by Frank Reininghaus, Thomas Korb, Herbert Schoeller · 1 citation
Physics and Astronomy · #Magnetic properties of thin films #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.97.026803

published as Phys. Rev. Lett. 97, 026803 (2006) · 5 pages, 4 figures

openalex publication_date 2006/07/14 · arxiv created 2006/07/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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.

Citations

• Spintronics: Fundamentals and applications
• Landauer formula for the current through an interacting electron region
• Field Dependence of the Intrinsic Domain Magnetization of a Ferromagnet

Cited by

• Lattice Green’s function approach to the solution of the spectrum of an array of quantum dots and its linear conductance