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Area of Science:

  • Spintronics
  • Materials Science
  • Device Physics

Background:

  • All-spin logic devices (ASLDs) are promising post-CMOS candidates due to low power, non-volatility, and logic-in-memory capabilities.
  • Understanding current-limiting factors is crucial for ASLD performance optimization.

Purpose of the Study:

  • To develop a physics-based model for ASLDs.
  • To investigate current-limiting factors including nano-magnet switching, spin transport, and channel breakdown.
  • To identify optimal device structures and materials for enhanced performance.

Main Methods:

  • Developed a physics-based model for ASLDs.
  • Investigated critical current (Ic0) using perpendicular magnetic anisotropy (PMA) nano-magnets.
  • Analyzed spin transport efficiency by varying device structure, dimensions, contact resistance, and material parameters.
  • Studied breakdown current density (JBR) for upper current limitations.

Main Results:

  • Proposed ASLDs with PMA nano-magnets to reduce critical current.
  • Identified asymmetric structures as optimal for managing current limitations.
  • Demonstrated that copper channels offer better energy efficiency than graphene but face breakdown current limits.
  • Quantified current-limiting conditions and estimated energy dissipation.

Conclusions:

  • The developed model provides insights into current limitations and energy dissipation in ASLDs.
  • Optimized ASLD design involves trade-offs between current limits and performance.
  • This work offers a benchmarking model for future spintronics applications and ASLD development.