Spin-filtering effect in a two-dimensional electron gas under a local fringe field

Seon Gu Huh, Jonghwa Eom, Hyun Cheol Koo, Hyung Jun Kim, Joonyeon Chang, Suk Hee Han

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We fabricated a spin-filtering device which consists of InAs based two-dimensional electron gas and two ferromagnetic pads. A fringe field at the edge of a ferromagnetic pad was used to induce spin polarization of the moving electrons in a two-dimensional electron gas. The direction of the fringe field was determined by the magnetization of the ferromagnetic pad, which was switched by using the external magnetic field. A current of which spins were aligned by one fringe field (polarizer) was filtered by the other fringe field (analyzer). The resistance of the device was in either a high state or a low state depending on the alignment of the fringe fields. The spin-filtering effect diminishes rapidly as the thermal energy exceeds the Zeeman splitting.

Original languageEnglish
Pages (from-to)3958-3961
Number of pages4
JournalPhysica Status Solidi (A) Applications and Materials Science
Volume204
Issue number12
DOIs
Publication statusPublished - 2007 Dec 1
Externally publishedYes

Fingerprint

Two dimensional electron gas
electron gas
Spin polarization
Thermal energy
Magnetization
Magnetic fields
Electrons
polarizers
thermal energy
analyzers
alignment
magnetization
polarization
magnetic fields
electrons
Direction compound
indium arsenide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Surfaces, Coatings and Films

Cite this

Spin-filtering effect in a two-dimensional electron gas under a local fringe field. / Huh, Seon Gu; Eom, Jonghwa; Koo, Hyun Cheol; Kim, Hyung Jun; Chang, Joonyeon; Han, Suk Hee.

In: Physica Status Solidi (A) Applications and Materials Science, Vol. 204, No. 12, 01.12.2007, p. 3958-3961.

Research output: Contribution to journalArticle

Huh, Seon Gu ; Eom, Jonghwa ; Koo, Hyun Cheol ; Kim, Hyung Jun ; Chang, Joonyeon ; Han, Suk Hee. / Spin-filtering effect in a two-dimensional electron gas under a local fringe field. In: Physica Status Solidi (A) Applications and Materials Science. 2007 ; Vol. 204, No. 12. pp. 3958-3961.
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