Abstract
We propose a novel spin-orbit torque (SOT) driven and voltage-gated domain wall motion (DWM)-based MTJ device and its application in neuromorphic computing. We show that by utilizing the voltage-controlled gating effect on the DWM, the access transistor can be eliminated. The device provides more control over individual synapse writing and shows highly linear synaptic behavior. The voltage-controlled DW- gating performance of the device in the crossbar array is quantified. The device long-term potentiation/depression (LTP/LTD) linearity dependence on material parameters such as DMI, at different temperatures, is evaluated for real-environment performance analysis. Furthermore, adopting the ideal and skyrmion leaky integrate and fire neuron models, we implement the spiking convolutional neural network for pattern recognition applications The DW-MTJ conductance was mapped to the weights of the SNN. When trained and tested on the CIFAR-10 data set, the architecture based on DW-MTJ synapse achieved accuracy of around 85%.
Original language | English (US) |
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Title of host publication | 2023 IEEE 23rd International Conference on Nanotechnology, NANO 2023 |
Publisher | IEEE Computer Society |
Pages | 976-981 |
Number of pages | 6 |
ISBN (Electronic) | 9798350333466 |
DOIs | |
State | Published - 2023 |
Event | 23rd IEEE International Conference on Nanotechnology, NANO 2023 - Jeju City, Korea, Republic of Duration: Jul 2 2023 → Jul 5 2023 |
Publication series
Name | Proceedings of the IEEE Conference on Nanotechnology |
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Volume | 2023-July |
ISSN (Print) | 1944-9399 |
ISSN (Electronic) | 1944-9380 |
Conference
Conference | 23rd IEEE International Conference on Nanotechnology, NANO 2023 |
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Country/Territory | Korea, Republic of |
City | Jeju City |
Period | 07/2/23 → 07/5/23 |
Bibliographical note
Publisher Copyright:© 2023 IEEE.
Keywords
- Domain wall devices
- MTJ
- Neuromorphic computing
- Skyrmions
- SNN
- Spintronics
- Synapses
- VCMA
ASJC Scopus subject areas
- Bioengineering
- Electrical and Electronic Engineering
- Materials Chemistry
- Condensed Matter Physics