Spin filtering and spin separation in 2D materials by topological spin Hall effect.

Area of Science:

• Condensed Matter Physics
• Materials Science
• Spintronics

Background:

• High-speed electronic devices demand novel materials and physical phenomena.
• Electron scattering in 2D ferromagnetic materials is crucial for advanced electronics.

Purpose of the Study:

• Investigate novel physical effects using electron scattering on magnetic skyrmions and vortices.
• Explore the potential of the topological spin Hall effect for spin current manipulation.

Main Methods:

• Utilized the Boltzmann kinetic equation for nonequilibrium distribution functions.
• Employed the Lippmann-Schwinger equation for the transition matrix.
• Analyzed the entire range of the adiabaticity parameter.

Main Results:

• Demonstrated efficient filtering, switching, and separation of spin currents via topological spin Hall effect.
• Achieved separation of Hall currents for different electron spin projections, analogous to charge carriers in the normal Hall effect.
• Observed spin filtering several orders of magnitude more efficient than conventional ferromagnetic spin polarization under specific conditions.

Conclusions:

• Magnetic skyrmions and vortices offer a promising route for advanced spin current control.
• The topological spin Hall effect presents a powerful mechanism for spintronics applications.
• This research paves the way for next-generation high-performance electronic devices.