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Logic Device Based on Skyrmion Annihilation.
- Source :
-
IEEE Transactions on Electron Devices . Apr2021, Vol. 68 Issue 4, p1939-1943. 5p. - Publication Year :
- 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. [ABSTRACT FROM AUTHOR]
- Subjects :
- *LOGIC devices
*SKYRMIONS
*LOGIC circuits
*NONVOLATILE memory
*HEAVY metals
Subjects
Details
- Language :
- English
- ISSN :
- 00189383
- Volume :
- 68
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Electron Devices
- Publication Type :
- Academic Journal
- Accession number :
- 150518022
- Full Text :
- https://doi.org/10.1109/TED.2021.3055157