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Voltage-controlled magnetic anisotropy gradient-driven skyrmion-based half-adder and full-adder.

Sarwath Sara¹, Chandrasekhar Murapaka², Arabinda Haldar¹

¹Department of Physics, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, Telangana 502284, India. arabinda@phy.iith.ac.in.

|January 3, 2024

Summary

Researchers developed energy-efficient binary adder circuits using skyrmions, a promising alternative for future data processing. This voltage-controlled method offers a robust and low-power approach for next-generation spintronic devices.

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Area of Science:

Spintronics
Condensed Matter Physics
Nanotechnology

Background:

Spintronic devices offer advantages over traditional charge-based electronics for information processing and storage.
Skyrmions, topologically protected spin textures, are highly promising for future data processing technologies due to their stability and controllability.

Purpose of the Study:

To propose and demonstrate binary adder circuits (half-adder and full-adder) based on skyrmions.
To investigate an energy-efficient voltage-controlled method for manipulating skyrmions in logic circuits.

Main Methods:

Micromagnetic simulations were employed to model and verify the functionality of skyrmion-based adder circuits.
Skyrmion manipulation was achieved using voltage-controlled magnetic anisotropy gradients, leveraging effects like the skyrmion Hall effect and inter-skyrmion repulsions.

Main Results:

Demonstrated successful half-adder and full-adder logic operations using skyrmions.
The voltage-controlled method proved energy-efficient and mitigated Joule heating issues inherent in current-driven approaches.
The proposed design exhibited reliable operation across a range of material and dimensional parameters, indicating robustness.

Conclusions:

Skyrmion-based binary adder circuits represent a viable pathway for next-generation computational architectures.
The voltage-controlled manipulation of skyrmions offers an energy-efficient and robust solution for non-volatile data processing.