Electrical detection of coherent spin precession using the ballistic intrinsic spin Hall effect

Won Young Choi, Hyung Jun Kim, Joonyeon Chang, Suk Hee Han, Hyun Cheol Koo, Mark Johnson

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

The spin-orbit interaction in two-dimensional electron systems provides an exceptionally rich area of research. Coherent spin precession in a Rashba effective magnetic field in the channel of a spin field-effect transistor and the spin Hall effect are the two most compelling topics in this area. Here, we combine these effects to provide a direct demonstration of the ballistic intrinsic spin Hall effect and to demonstrate a technique for an all-electric measurement of the Datta-Das conductance oscillation, that is, the oscillation in the source-drain conductance due to spin precession. Our hybrid device has a ferromagnet electrode as a spin injector and a spin Hall detector. Results from multiple devices with different channel lengths map out two full wavelengths of the Datta-Das oscillation. We also use the original Datta-Das technique with a single device of fixed length and measure the channel conductance as the gate voltage is varied. Our experiments show that the ballistic spin Hall effect can be used for efficient injection or detection of spin polarized electrons, thereby enabling the development of an integrated spin transistor.

Original languageEnglish
Pages (from-to)666-670
Number of pages5
JournalNature Nanotechnology
Volume10
Issue number8
DOIs
Publication statusPublished - 2015 Aug 6

Fingerprint

Spin Hall effect
Ballistics
precession
ballistics
Hall effect
Equipment and Supplies
Electric variables measurement
Electrons
Magnets
Orbit
Magnetic Fields
Field effect transistors
Electrodes
Transistors
Orbits
Demonstrations
Magnetic fields
Detectors
Wavelength
Injections

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering
  • Materials Science(all)
  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics

Cite this

Electrical detection of coherent spin precession using the ballistic intrinsic spin Hall effect. / Choi, Won Young; Kim, Hyung Jun; Chang, Joonyeon; Han, Suk Hee; Koo, Hyun Cheol; Johnson, Mark.

In: Nature Nanotechnology, Vol. 10, No. 8, 06.08.2015, p. 666-670.

Research output: Contribution to journalArticle

Choi, Won Young ; Kim, Hyung Jun ; Chang, Joonyeon ; Han, Suk Hee ; Koo, Hyun Cheol ; Johnson, Mark. / Electrical detection of coherent spin precession using the ballistic intrinsic spin Hall effect. In: Nature Nanotechnology. 2015 ; Vol. 10, No. 8. pp. 666-670.
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