Intrinsic Nonlinear Electric Spin Generation in Centrosymmetric Magnets

Area of Science:

• Condensed Matter Physics
• Materials Science
• Spintronics

Background:

• Current spintronics paradigms primarily rely on linear spin response.
• Centrosymmetric magnets have been largely unexplored for intrinsic spin generation effects.

Purpose of the Study:

• To propose and theoretically describe a novel intrinsic nonlinear electric spin generation effect.
• To elucidate the band geometric and symmetry origins of this effect.
• To explore its potential in centrosymmetric magnets for advanced spintronics applications.

Main Methods:

• Theoretical formulation of the intrinsic nonlinear electric spin generation effect.
• Analysis of band geometric properties and symmetry characters.
• First-principles calculations for material-specific predictions.

Main Results:

• Identified an intrinsic nonlinear electric spin generation effect dominant in centrosymmetric magnets.
• Established the band geometric origin and symmetry characteristics of the effect.
• Predicted significant nonlinear spin generation in single-layer MnBi2Te4.

Conclusions:

• The proposed effect is an intrinsic material property determined by band structure.
• This discovery opens new avenues for all-electric control in spintronics.
• The findings pave the way for utilizing centrosymmetric magnets beyond the linear spin response paradigm.