Emergent inductance in antiferromagnetic systems with spin-orbit coupling

Area of Science:

• Spintronics
• Condensed Matter Physics
• Materials Science

Background:

• Emergent inductance offers advantages for device scaling, with magnitude inversely proportional to cross-sectional area.
• Antiferromagnetic (AFM) systems with spin-orbit coupling (SOC) are explored for emergent inductance applications.

Purpose of the Study:

• Investigate emergent inductance in AFM systems with SOC.
• Derive analytic formulas for AFM emergent inductance in nanodevices.
• Explore potential for spintronic inductor devices.

Main Methods:

• Theoretical derivation of analytic formulas for emergent inductance.
• Numerical simulations to verify inductance formulas.
• Analysis of material parameter effects (magnetic anisotropy, Gilbert damping).

Main Results:

• Opposite sublattice SOC configuration is crucial for efficient AFM precession and spin motive force generation.
• Derived inductance formulas are robust up to the sub-THz frequency range.
• Identified trade-offs between inductance, quality factor, and bandwidth via material design.
• Observed and evaluated a transition from linear to nonlinear inductance models at high current densities and frequencies.

Conclusions:

• Néel spin-orbit torque (SOT)-driven AFM ultrafast electrical response offers new insights.
• Potential for developing spintronic inductor devices for high-density and sub-THz applications.
• Material design can optimize inductance and quality factor, albeit with bandwidth trade-offs.