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Paramagnetic ion-doped nanocrystal as a voltage-controlled spin filter.

Authors
  • Efros, A L
  • Rashba, E I
  • Rosen, M
Type
Published Article
Journal
Physical review letters
Publication Date
Nov 12, 2001
Volume
87
Issue
20
Pages
206601–206601
Identifiers
PMID: 11690502
Source
Medline
License
Unknown

Abstract

A theory of spin injection from a ferromagnetic source into a semiconductor through a paramagnetic ion-doped nanocrystal is developed. Spin-polarized current from the source polarizes the ion; the polarized ion, in turn, controls the spin polarization of the current flowing through the nanocrystal. Depending on voltage, the ion can either enhance the injection coefficient by several times or suppress it. Large ion spins produce stronger enhancement of spin injection.

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