Universal spin-polarization fluctuations in one-dimensional wires with magnetic impurities

N. A. Mortensen and J. C. Egues
Phys. Rev. B 66, 153306 – Published 4 October 2002
PDFExport Citation

Abstract

We study conductance and spin-polarization fluctuations in one-dimensional wires with spin-5/2 magnetic impurities (Mn). Our tight-binding Green function approach goes beyond the mean field thus including s-d exchange-induced spin-flip scattering. In a certain parameter range, we find that spin-flip suppresses conductance fluctuations while enhancing spin-polarization fluctuations. More importantly, spin-polarization fluctuations attain a universal value 1/3 for large enough spin-flip strengths. This intrinsic spin-polarization fluctuation may pose a severe limiting factor to the realization of steady spin-polarized currents in Mn-based one-dimensional wires.

  • Received 12 July 2002

DOI:https://doi.org/10.1103/PhysRevB.66.153306

©2002 American Physical Society

Authors & Affiliations

N. A. Mortensen*

  • Mikroelektronik Centret, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
  • Ørsted Laboratory, Universitetsparken 5, DK-2100 CopenhagenØ, Denmark

J. C. Egues

  • Departamento de Física e Informática, Instituto de Física de São Carlos Universidade de São Paulo, 13560-970 São Carlos, São Paulo, Brazil
  • Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland

  • *Electronic address: nam@crystal-fibre.com
  • Electronic address: egues@if.sc.usp.br

References (Subscription Required)

Click to Expand
Issue

Vol. 66, Iss. 15 — 15 October 2002

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×