Events

[Seminar] : Design and Modeling of Resistive Switching Devices for Neuromorphic Applications

Speaker: Dr. Revathy Padmanabhan, Department of Electrical Engineering, Indian Institute of Technology Palakkad.

Title: “Design and Modelling of Resistive Switching Devices for Neuromorphic Applications”

Date: Thursday, April 3rd, 2025 – Time: 3:30 PM

Hi-Tea & Coffee: 4:30 PM

Venue: CeNSE Seminar Hall

Abstract:

Resistive switching devices are a critical component for the realization of computational systems that mimic biological neural systems. Resistive switching devices with multiple conductance states can mimic this biological spike-time-dependent plasticity (STDP) behaviour, with multiple conductance states being analogous to different synaptic weights. The change in conductance in memristors can be broadly attributed to vacancy migration inside the switching layer (valence change memory: VCM) or the formation of metallic filaments inside the switching layer (electrochemical metallization: ECM).

Our work models the transport in ECM and VCM-based memristors, focusing on explaining and capturing their current-voltage characteristics. Our model also captures the switching dynamics (with an emphasis on estimating switching energies and delays) and explains the experimentally observed STDP behaviour in these devices. The simulation results obtained using our model (and implemented in Verilog-A) have been validated with experimental data from multiple sources. Our work demonstrates the flexibility of including different transport mechanisms in a unified framework.

Biography:
Revathy Padmanabhan received the PhD degree in electrical communication engineering from Indian Institute of Science, in 2014. She was a postdoctoral fellow at Technion-Israel Institute of Technology, Haifa, Israel, until July 2017, after which she joined the Indian Institute of Technology Palakkad, where she is an Associate Professor currently. Her research interests include design, fabrication, and characterisation of different multi-functional optically sensitive devices. Her research group also works on modeling, fabrication, and characterisation of resistive-switching devices and 2D-transistors. She also works on energy-landscape analysis for different device systems, such as ferroelectric-based MEMS and FETs.

Host Faculty: Prof. Gayathri Pillai