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Generation of spin currents via Raman scattering
Ali Najmaie1, E Ya Sherman, J E Sipe
1Department of Physics and Institute for Optical Sciences, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada. anajmaie@physics.utoronto.ca
Physical Review Letters
|August 11, 2005
Summary
This study demonstrates that stimulated spin-flip Raman scattering can generate pure spin currents in doped semiconductors. These spin currents are theoretically detectable using optical spectroscopy and the anomalous Hall effect.
Area of Science:
- Condensed matter physics
- Spintronics
- Semiconductor physics
Background:
- Semiconductors with spin-split bands are crucial for spintronics.
- Efficient methods for generating spin currents are needed for advanced electronic devices.
Purpose of the Study:
- To theoretically investigate the potential of stimulated spin-flip Raman scattering for spin current injection.
- To explore the feasibility of generating pure spin currents in specific semiconductor structures.
Main Methods:
- Theoretical modeling of stimulated spin-flip Raman scattering.
- Analysis of spin current generation in doped semiconductors with spin-split bands.
- Consideration of zinc blende crystal structures.
Main Results:
- Stimulated spin-flip Raman scattering is shown to be a viable mechanism for injecting spin currents.
- A pure spin current can be generated in zinc blende semiconductors.
- The generated spin current is theoretically predictable via optical and electrical measurements.
Conclusions:
- This theoretical work provides a pathway for generating spin currents using optical methods.
- The proposed technique offers a method for creating pure spin currents in spintronic devices.
- Experimental verification using pump-probe spectroscopy and anomalous Hall effect measurements is suggested.