Publications
2020

Revisiting Stochastic Computing in the Era of Nanoscale Nonvolatile Technologies
A. Agrawal, I. Chakraborty, D. Roy, U. Saxena, S. Sharmin, M. Koo, Y. Shim, G. Srinivasan, C. Liyanagedera, A. Sengupta, K. Roy
IEEE Transactions on Very Large Scale Integration (VLSI) Systems 
Functional Read Enabling InMemory Computations in 1Transistor1Resistor Memory Arrays
A. Jaiswal, R. Andrawis, A. Agrawal, K. Roy
IEEE Transactions on Circuits and Systems II: Express Briefs, December 2020, pp. 3347  3351 
Circuits and Architectures for InMemory ComputingBased Machine Learning Accelerators
A. Ankit, I. Chakraborty, A. Agrawal, M. Ali, K. Roy
IEEE Micro, NovDec 2020, pp 822 
Resistive Crossbars as Approximate Hardware Building Blocks for Machine Learning: Opportunities and Challenges
I. Chakraborty, M. Ali, A. Ankit, S. Jain, S. Roy, S. Sridharan, A. Agrawal, A. Raghunathan, K. Roy
Proceedings of IEEE, December 2020, pp. 2276  2310 
A new oscillator coupling function for improving the solution of graph coloring problem
R. Andrawis, K. Roy
Physica D: Nonlinear Phenomena, November 2020 
Gradual Channel Pruning while Training suing Feature Relevance Scores for Convolutional Neural Networks
A. Aketi, S. Roy, A. Raghunathan, K. Roy
IEEE ACCESS, September 2020 
iSRAM: Interleaved Wordlines for Vector Boolean Operations Using SRAMs
A. Jaiswal, A. Agrawal, M. Ali, S. Sharmin, K. Roy
IEEE Transactions on Circuits and Systems 
Neural Computing with Magnetoelectric DomainWall based NeuroSynaptic Devices
A. Agrawal, A. Jaiswal, P. Panda, K. Roy
IEEE Transactions on Magnetics, 2020, Digital Object Identier 
sBSNN: StochasticBits Enabled Binary Spiking Neural Network With OnChip Learning for Energy Efficient Neuromorphic Computing at the Edge
M. Koo, G. Srinivasan, K. Roy
IEEE Transactions on Circuits and Systems I: Regular Papers, 2020 
Biologically Plausible Class Discrimination Based Recurrent Neural Network Training for Motor Pattern Generation
P. Wijesinghe, C. Liyanagendra, K. Roy
Frontiers in Neuroscience, 2020 
Towards Scalable, Efficient and Accurate Deep Spiking Neural Networks with Backward Residual Connections, Stochastic Softmax and Hybridization
P. Panda, S. Aketi, K. Roy
Frontiers in Neuroscience, 2020 
Bayesian MultiObjective Hyperparameter Optimization for Accurate, Fast, and Efficient Neural Network Accelerator Design
M. Parsa, J. Mitchell, C. Schuman, R. Patton, T. Potok, K. Roy
Frontiers in Neuroscience, 14, 667, 2020 
IMAC: InMemory MultiBit Multiplication and Accumulation in 6T SRAM Array
M. Ali, A. Jaiswal, S. Kodge, A. Agrawal, I. Chakraborty, K. Roy
IEEE Transactions on Circuits and Systems I: Regular Papers, 2020 
PANTHER: A programmable architecture for neural network training harnessing energyefficient ReRAM
A. Ankit, I. El Hajj, S. Agarwal, M. Marinella, M. Foltin, J. Strachan, D. S. Milojicic, W. Hwu, K. Roy
IEEE Transactions on Computer, 2020 
RxNN: A framework for evaluating deep neural networks on resistive crossbars
S. Jain, I. Sengupta, K. Roy, A. Raghunathan
IEEE Transactions on ComputerAided Design of ICs, 2020 
Antiferroelectric Tunnel Junctions as EnergyEfficient Coupled Oscillators: Modeling, Analysis, and Application to Solving Combinatorial Optimization Problems
R. Andrawis, K. Roy
IEEE Transactions on Electron Devices, Issue 7, Vol. 67, 2020 
Perovskite Neural Trees
H. Zhang, T. Park, I. Zaluzhnyy, Q. Wang, S. Wadekar, S. Manna, R. Andrawis, P. Sprau, Y. Sun, Z. Zhang, C. Huang, H. Zhou, Z. Zhang, B. Narayanan, G. Srinivasan, N. Hua, E. Nazaretski, X. Huang, H. Yan, M. Ge, Y. Chu, M. Cherukara, M. Holt, M. Krishnamurthy, O. Shpyrko, S. Sankaranarayanan, A. Frano, K. Roy, S. Ramanathan
Nature Communications, May 7, 2020 
Pathways to Efficient Neuromorphic Computing with NonVolatile Memory Technologies
I. Chakraborty, A. Jaiswal, A. Saha, S. Gupta, K. Roy
Applied Physics Reviews, Vol.7, Issue 2 
Organismic materials for beyond von Neumann machines
H. Zhang, P. Panda, J. Lin, Y. Kalcheim, K. Wang, J. Freeland, D. Fong, S. Priya, I. Schuller, S. Sankaranarayanan, K. Roy, S. Ramanathan
Applied Physics Reviews, January 2020 
Controlled Forgetting: Targeted Stimulation and Dopaminergic Plasticity Modulation for Unsupervised Lifelong Learning in Spiking Neural Networks
J. Allred, K. Roy
Frontiers in Neuroscience, January 28, 2020 
InMemory LowCost BitSerial Addition Using Commodity DRAM Technology
M. Ali, A. Jaiswal, K. Roy
IEEE Transactions on Circuits and Systems I: Regular Papers, January 2020 
Constructing Energyefficient Mixedprecision Neural Networks through Principle Component Analysis for Edge Intelligence
I. Chakraborty, D. Roy, I. Garg, A. Ankit, K. Roy
Nature: Machine Intelligence, January 2020
2019

InSitu Unsupervised Learning using Stochastic Switching in MagnetoElectric Magnetic Tunnel Junctions
I. Chakraborty, A. Agrawal, A. Jaiswal, G. Srinivasan, K. Roy
Philosophical Transactions of the Royal Society A, December 2019 
A Low Effort Approach to Structured CNN Design Using PCA
I. Garg, P. Panda, K. Roy
IEEE ACCESS, December 2019 
Neural Network Accelerator Design with Resistive Crossbars: Opportunities and Challenges
S. Jain, A. Ankit, I. Chakraborty, T. Gokmen, M. Rasch, W. Haensch, K. Roy, A. Raghunathan
IBM Journal of Research and Development, 10:110:13, Nov/Dec. 2019 
Towards Spikebased Machine Intelligence with Neuromorphic Computing
K. Roy, A.Jaiswal, P. Panda
Nature, November 27, 2019 
Discretization Based Solutions for Secure Machine Learning Against Adversarial Attacks
P. Panda, I. Chakraborty, K. Roy
IEEE Access, May 2019 
TreeCNN: A hierarchical Deep Convolutional Neural Network for incremental learning
D. Roy, P. Panda, K. Roy
Neural Networks, September 2019 
Dynamic Read Current Sensing with Amplified Bitline Voltage for STTMRAMs
M. Ali, R. Andrawis, K. Roy
IEEE Transactions on Circuits and Systems II: Express Briefs, 2019 
Reinforcement Learning with LowComplexity Liquid State Machines
W. Ponghiran, G. Srinivasan, K. Roy
Frontiers in Neuroscience, August 2019 
Structured Learning for Action Recognition in Videos
Y. Long, G. Srinivasan, P. Panda, K. Roy
IEEE Journal on Emerging and Selected Topics in Circuits and Systems, August 2019 
Pathways to Efficient Neuromorphic Computing with NonVolatile Technologies
I. Chakraborty, A. Jaiswal, A. Saha, S. Gupta, K. Roy
Applied Physics Review, July 2019 
Perovskite Nickelates as Bioelectronic Interfaces
H. Zhang, F. Zuo, F. Li, H. Chan, Q. Wu, Z. Zhang, B. Narayanan, K. Ramadoss, I. Chakraborty, G. Saha, G. Kamath, K. Roy, H. Zhou, A. Chubykin, S. Sankaranarayanan, J. Choi, S. Ramanathan
Nature Communications 
Fast Switching in CoTb Based Ferrimagnetic Tunnel Junction
A. Reza, K. Roy
Journal of Applied Physics 
Dynamic Read Current Sensing with Amplified Bitline Voltage for STTMRAMs
M. Ali, R. Andrawis, K. Roy
IEEE Transactions on Circuits and Systems 
XcelRAM: Accelerating Binary Neural Networks in HighThroughput SRAM Compute Arrays
A. Agrawal, A. Jaiswal, D. Roy, B. Han, G. Srinivasan, A. Ankit, K. Roy
IEEE Transactions on Circuits and Systems 
Powerline Communication for Enhanced Connectivity in Neuromorphic Systems
A. Ankit, M. Koo, S. Sen, and K. Roy
IEEE Transactions on VLSI Systems 
SPARE: Spiking Neural Network Acceleration Using ROMEmbedded RAMs as InMemoryComputation Primitives
A. Agrawal, A. Ankit, K. Roy
IEEE Transactions on Computers 
Cache Memory Design with magnetic Skyrmions in a Long Nanotrack
MC Chen, A. Ranjan, A. Raghunathan, K. Roy
IEEE Transactions on Magnetics 
Nonequilibrium Green's Function and Firstprinciples Approach to Modeling of Multiferroic Tunnel Junctions
R. Andrawis, K. Roy
Physical Review Applied 
Exploiting Inherent Error Resiliency of Deep Neural Networks to Achieve Extreme Energy Efficiency Through MixedSignal Neurons
B. Chatterjee, P. Panda, S. Maity, A. Biswas, K. Roy, S. Sen
IEEE Transactions on Very Large Scale Integration (VLSI) Systems 
Synthesizing Images from SpatioTemporal Representations using Spikebased Backpropagation
D. Roy, P. Panda, K. Roy
Frontiers in NeuroscienceNeuromorphic Engineering 
Discretization based Solutions for Secure Machine Learning against Adversarial Attacks
P. Panda, K. Roy
IEEE Access, Digital Object Identifier 
Analysis of Liquid Ensembles for Enhancing the Performance and Accuracy of Liquid State Machines
P. Wijesinghe, G. Srinivasan, P. Panda, K. Roy
Frontiers in NeuroscienceNeuromorphic Engineering, May 2019 
Nonequilibrium Greens Function and FirstPrinciples Approach to Modeling of Multiferroic Tunnel Junctions
R. Andrawis, K. Roy
Physical Review Applied 12, no. 1 (2019) 
Effect of DzyaloshinskiiMoriya Interaction at Ferrimagnet and Heavy Metal Interface
A. Reza, K. Roy
IEEE Transactions on Electron Devices 
Mimicking LeakyIntegrateFire Spiking neuron Using Automotion of Domain Walls for EnergyEfficient BrainInspired Computing
A. Agrawal, K. Roy
IEEE Transactions on Magnetics 
Photonic Inmemory Computing Primitive for Spiking Neural Networks using Phasechange Materials
I. Chakraborty, G. Saha, K. Roy
Physical Review Applied
2018

Capacitively Driven Global Interconnect with Magnetoelectric Switching Based Receiver for Higher Energy Efficiency
Z. Al Azim, A. Jaiswal, I. Chakraborty, K. Roy
IEEE Magnetics Letters 
Insitu, InMemory Stateful Vector Logic Operations based on Voltage Controlled Magnetic Anisotropy
A. Jaiswal, A. Agrawal, K. Roy
Scientific reports 8 (1), 5738 
AllPhotonic Phase Change Spiking Neuron: Toward Fast Neural Computing using Light
I. Chakraborty, G. Saha, A. Sengupta, K. Roy
arXiv preprint arXiv:1804.00267 
Biased Random Walk Using Stochastic Switching of Nanomagnets: Application to SAT Solver
Y. Shim, A. Sengupta, K. Roy
IEEE Transactions on Electron Devices 65 (4), 16171624 
STDP Based Pruning of Connections and Weight Quantization in Spiking Neural Networks for EnergyEfficient Recognition
N. Rathi, P. Panda, K. Roy
IEEE Transactions on ComputerAided Design of Integrated Circuits and Systems 
ELECTRONIC COMPARISON SYSTEMS
K. Roy, M. Sharad
US Patent App. 15/801,535 
Stochastic Switching of Nanomagnets for PostCMOS Computing
A. Sengupta, Y. Shim, K. Roy
Bulletin of the American Physical Society 
Multiresistance states and neural learning with perovskite nickelates
F. Zuo, P. Panda, K. Roy, S. Ramanathan
Bulletin of the American Physical Society 
Proposal for a Low Voltage AnalogtoDigital Converter using Voltage Controlled Stochastic Switching of Low Barrier Nanomagnets
I. Chakraborty, A. Agrawal, K. Roy
arXiv preprint arXiv:1803.01431 
1T NonVolatile Memory Design Using Sub10nm Ferroelectric FETs
A. Sharma, K. Roy
IEEE Electron Device Letters 39 (3), 359362 
Asp: Learning to forget with adaptive synaptic plasticity in spiking neural networks
P. Panda, J. M. Allred, S. Ramanathan, K. Roy
IEEE Journal on Emerging and Selected Topics in Circuits and Systems 8 (1 … 
8T SRAM cell as a multibit dot product engine for beyond vonNeumann computing
A. Jaiswal, I. Chakraborty, A. Agrawal, K. Roy
arXiv preprint arXiv:1802.08601 
Optical Receiver with Helicity Dependent Switching of Magnetization
Z. A. Azim, T. A. Ostler, C. Xu, K. Roy
arXiv preprint arXiv:1803.07148 
TreeCNN: A Deep Convolutional Neural Network for Lifelong Learning
D. Roy, P. Panda, K. Roy
arXiv preprint arXiv:1802.05800 
Neuromorphic computing enabled by physics of electron spins: Prospects and perspectives
A. Sengupta, K. Roy
Applied Physics Express 11 (3), 030101 
Going Deeper in Spiking Neural Networks: VGG and Residual Architectures
A. Sengupta, Y. Ye, R. Wang, C. Liu, K. Roy
arXiv preprint arXiv:1802.02627 
VLSI Design of an MLBased PowerEfficient Motion Estimation Controller for Intelligent Mobile Systems
J. H. Hsieh, H. R. Wang
IEEE Transactions on Very Large Scale Integration (VLSI) Systems 26 (2), 262271 
Designing EnergyEfficient Intermittently Powered Systems Using SpinHallEffectBased Nonvolatile SRAM
A. Raha, A. Jaiswal, S. S. Sarwar, H. Jayakumar, V. Raghunathan, K. Roy
IEEE Transactions on Very Large Scale Integration (VLSI) Systems 26 (2), 294307 
Adaptive accelerated aging for 28nm HKMG technology
D. Patra, A. K. Reza, M. K. Hassan, M. Katoozi, E. H. Cannon, K. Roy, Y. Cao
Microelectronics Reliability 80, 149154 
Development of a Generic and Configurable Fuzzy Logic Systems Library for RealTime Control Applications using an Objectoriented Approach
A. Hailemchael, S. Gebreyohannes, A. Karimoddini, K. Roy, A. Homaifar
2018 Second IEEE International Conference on Robotic Computing (IRC), 159164 
STDPbased Unsupervised Feature Learning using Convolutionovertime in Spiking Networks for EnergyEfficient Neuromorphic Computing
G. Srinivasan, P. Panda, K. Roy
ACM Journal on Emerging Technologies in Computing Systems 
XSRAM: Enabling InMemory Boolean Computations in CMOS Static Random Access Memories
A. Agrawal, A. Jaiswal, C. Lee, K. Roy
IEEE Transactions on Circuits and Systems I: Regular Papers 
Energy Efficient Neural Computing: A Study of CrossLayer Approximations
S. Sarwar, G. Srinivasan, B. Han, P. Wejisinghe, A. Jaiswal, P. Panda, A. Raghunathan, K. Roy
IEEE Journal on Emerging and Selected Topics in Circuits and Systems 
Toward Fast Neural Computing using AllPhotonic Spiking Neurons
I. Chakraborty, G. Das, K. Roy
Scientific Reports 8 
Encoding Neural and Synaptic Functionalities in Electron Spin: A Pathway to Efficient Neuromorphic Computing
A. Sengupta, K. Roy
Applied Physics Reviews 
CrossLayer Design Exploration for EnergyQuality Tradeos in Spiking and NonSpiking Deep Artificial Neural Networks
B. Han, A. Ankit, A. Sengupta, K. Roy
IEEE Transactions On MultiScale Computing 
Perspective: Stochastic Magnetic Devices for Cognitive Computing
K. Roy, A. Sengupta, Y. Shim
Journal of Applied Physics 
Design of a lowvoltage analogtodigital converter using voltagecontrolled stochastic switching of low barrier nanomagnets
I. Chakraborty, A. Agrawal, K. Roy
IEEE Magnetics Letters 9 
Optical Receiver with Helicity Dependent Magnetization Reversal
T. Ostler, Z. Azim, C. Xu, K. Roy
IEEE Transactions on Magnetics 
An AllMemristor Deep Spiking Neural Computing System: A Step Towards Realizing LowPower Stochastic Brain
P. Wejisinghe, A. Sengupta, A. Ankit, K. Roy
IEEE Transactions on Emerging Topics in Computational Intelligence 
STDP Based Unsupervised Multimodal Learning with Crossmodal Processing in Spiking Neural Networks
N. Rathi, K. Roy
IEEE Transactions on Emerging Topics in Computational Intelligence, October 2018 
Technology Aware Training in Memristive Neuromorphic Systems for nonideal Synaptic Crossbars
I. Chakraborty, D. Roy, K. Roy
IEEE Transactions on Emerging Topics in Computational Intelligence 
Image Edge Detection based on Swarm Intelligence using Memristive Networks
Z. Pajouhi, K. Roy
IEEE Transactions on ComputerAided Design of ICs, 2017 
DeltaFrameBP: An Algorithm using Frame Difference for Deep Convolutional Neural Network Training and Inference on Video Data
B. Han, K. Roy
IEEE Transactions on MultiScale Computing Systems 
Training Deep Spiking Convolutional Neural Networks with STDPbased Unsupervised Pretraining followed by Supervised Finetuning
C. Lee, P. Panda, G. Srinivasan, K. Roy
Frontiers in Neuroscience, August 2018 
Magnetic Skyrmion as a Spintronic Deep Learning Spiking Neuron Processor
M.C. Chen, A. Sengupta, K. Roy
IEEE Transactions on Magnetics 
SOTMRAM based on Shared Bitline Structure
Y. Seo, K. Roy
IEEE Transactions on VLSI Systems 
Design and Comparative Analysis of Spintronic Memories based on Current and Voltage driven Switching
R. Andrawis, A. Jaiswal, K. Roy
IEEE Transactions on Electron Devices 
Deep Spiking Convolutional Neural Network Trained with Unsupervised Spike Timing Dependent Plasticity
C. Lee, G. Srinivasan, P. Panda, K. Roy
IEEE Transactions on Cognitive and Developmental Systems, May 2018