Skyrmions-based logic gates in one single nanotrack completely reconstructed via chirality barrier

TL;DR

This paper introduces a novel skyrmions-based single-nanotrack logic family capable of implementing multiple logic gates through DMI chirality barrier manipulation, enhancing integration and energy efficiency in spintronic devices.

Contribution

It presents a new approach to reconfigurable skyrmion logic gates in a single nanotrack by controlling DMI chirality barriers, enabling complex logic functions with improved scalability.

Findings

Successful implementation of multiple logic gates in a single nanotrack.

Demonstration of skyrmion annihilation, fusion, and shunting via DMI reversal.

Enhanced potential for integrated, energy-efficient spintronic logic devices.

Abstract

Logic gates based on magnetic elements are promising candidates for the logic-in-memory applications with nonvolatile data retention, near-zero leakage and scalability. In such spin-based logic device, however, the multi-strip structure and fewer functions are obstacles to improving integration and reducing energy consumption. Here we propose a skyrmions-based single-nanotrack logic family including AND, OR, NOT, NAND, NOR, XOR, and XNOR which can be implemented and reconstructed by building and switching Dzyaloshinskii-Moriya interaction (DMI) chirality barrier on a racetrack memory. Besides the pinning effect of DMI chirality barrier on skyrmions, the annihilation, fusion and shunting of two skyrmions with opposite chirality are also achieved and demonstrated via local reversal of DMI, which are necessary for the design of engineer programmable logic nanotrack, transistor and complementary racetrack memory.