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Related Experiment Videos

Room-temperature reversible spin Hall effect.

T Kimura1, Y Otani, T Sato

  • 1Institute for Solid State Physics, University of Tokyo 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan. kimura@issp.u-tokyo.ac.jp

Physical Review Letters
|May 16, 2007
PubMed
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Researchers demonstrated the reversible spin Hall effect at room temperature using platinum. This breakthrough achieved significantly higher spin Hall conductivities, confirming fundamental principles of spin and charge current relationships.

Area of Science:

  • Condensed Matter Physics
  • Spintronics
  • Materials Science

Background:

  • The spin Hall effect (SHE) is crucial for spintronics, enabling charge-to-spin conversion.
  • Understanding the reversibility and magnitude of SHE is key for device applications.
  • Previous studies in semiconductor systems reported limited spin Hall conductivity values.

Purpose of the Study:

  • To electrically detect the reversible spin Hall effect at room temperature.
  • To investigate the potential of platinum as a material for efficient spin current generation and detection.
  • To determine the spin Hall conductivity and verify Onsager reciprocal relations.

Main Methods:

  • Fabrication of a lateral structure utilizing a platinum wire with strong spin-orbit interaction.

Related Experiment Videos

  • Electrical detection of both direct and inverse spin Hall effects.
  • Measurement of spin Hall conductivities at room temperature.

    • Main Results:

    • Successful electrical detection of the reversible spin Hall effect at room temperature.
    • Achieved spin Hall conductivities of 2.4 x 10^4 (Omega m)^-1, significantly higher than semiconductor systems.
    • Experimental confirmation of identical spin Hall conductivities for both direct and inverse effects.

    Conclusions:

    • Platinum exhibits a strong spin Hall effect suitable for spintronic applications.
    • The study confirms the Onsager reciprocal relations between spin and charge currents.
    • The findings pave the way for novel spintronic devices leveraging efficient spin-charge conversion.