Monalisha, P and Kumar, APS and Wang, XR and Piramanayagam, SN (2022) Emulation of Synaptic Plasticity on a Cobalt-Based Synaptic Transistor for Neuromorphic Computing. In: ACS Applied Materials and Interfaces, 14 (9). pp. 11864-11872.
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Abstract
Neuromorphic computing (NC), which emulates neural activities of the human brain, is considered for the low-power implementation of artificial intelligence. Toward realizing NC, fabrication, and investigations of hardware elements─such as synaptic devices and neurons─are crucial. Electrolyte gating has been widely used for conductance modulation by massive carrier injections and has proven to be an effective way of emulating biological synapses. Synaptic devices, in the form of synaptic transistors, have been studied using various materials. Despite the remarkable progress, the study of metallic channel-based synaptic transistors remains massively unexplored. Here, we demonstrated a three-terminal electrolyte gating-modulated synaptic transistor based on a metallic cobalt thin film to emulate biological synapses. We have realized gating-controlled, non-volatile, and distinct multilevel conductance states in the proposed device. The essential synaptic functions demonstrating both short-term and long-term plasticity have been emulated in the synaptic device. A transition from short-term to long-term memory has been realized by tuning the gate pulse parameters, such as amplitude and duration. The crucial cognitive behavior, including learning, forgetting, and re-learning, has been emulated, showing a resemblance to the human brain. Beyond that, dynamic filtering behavior has been experimentally implemented in the synaptic device. These results provide an insight into the design of metallic channel-based synaptic transistors for NC.
| Item Type: | Journal Article |
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| Publication: | ACS Applied Materials and Interfaces |
| Publisher: | American Chemical Society |
| Additional Information: | The copyright for this article belongs to the Authors. |
| Keywords: | Brain; Cobalt; Electrolytes, Biological synapse; Cobalt-based; Human brain; Metallic channel; Metallics; Multilevel state; Multilevels; Neuromorphic computing; Synaptic plasticity; Synaptic transistor, Transistors, biomimetic material; cobalt, artificial intelligence; chemistry; computer analysis; learning; nerve cell; nerve cell plasticity; physiology; synapse; transistor, Artificial Intelligence; Biomimetic Materials; Cobalt; Computing Methodologies; Learning; Neuronal Plasticity; Neurons; Synapses; Transistors, Electronic |
| Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
| Date Deposited: | 16 Jun 2022 11:14 |
| Last Modified: | 16 Jun 2022 11:14 |
| URI: | https://eprints.iisc.ac.in/id/eprint/73761 |
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