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Logic Device Based on Skyrmion Annihilation
- Source :
- IEEE Transactions on Electron Devices. 68:1939-1943
- Publication Year :
- 2021
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2021.
-
Abstract
- Skyrmion-based devices are an attractive candidate for nonvolatile memory and low-power computation. In a real device, however, skyrmions easily annihilate at device edges, which hampers device applications. Here, we present a novel skyrmion-based logic device, which takes advantage of the skyrmion annihilation (SA) and increases the efficiency of logic operation. An SA half adder (HA) is implemented in a ferromagnet/heavy metal nanotrack by introducing a geometric notch that annihilates the skyrmion. In addition, full adder and ${n}$ -bit SA ripple-carry adder are demonstrated by directly cascading the SA HAs. The prototype of a 32-bit SA ripple-carry adder consumes energy as low as 0.62 pJ per each operation, which is only 18% of the previously proposed skyrmion adder. Our SA logic gate can, therefore, be a promising candidate for the beyond-CMOS logic device.
- Subjects :
- 010302 applied physics
Physics
Adder
Annihilation
Computation
Skyrmion
Topology
01 natural sciences
Electronic, Optical and Magnetic Materials
Non-volatile memory
Logic gate
0103 physical sciences
Hardware_ARITHMETICANDLOGICSTRUCTURES
Electrical and Electronic Engineering
Micromagnetics
Energy (signal processing)
Subjects
Details
- ISSN :
- 15579646 and 00189383
- Volume :
- 68
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Electron Devices
- Accession number :
- edsair.doi...........87ec740ef0ca7e687049b52b497471d2