Networks and systems which exhibit brain-like behavior can analyze information from intrinsically noisy and unstructured data with very low power consumption. Such characteristics arise due to the critical nature and complex interconnectivity of the brain and its neuronal network. We demonstrate that a system comprising of multilayer hexagonal Boron Nitride (hBN) films contacted with Silver (Ag), that can uniquely host two different self-assembled networks, which are self-organized at criticality (SOC). This system shows bipolar resistive switching between high resistance (HRS) and low resistance states (LRS). In the HRS, Ag clusters (nodes) intercalate in the van der Waals gaps of hBN forming a network of tunnel junctions, whereas the LRS contains a network of Ag filaments. The temporal avalanche dynamics in both these states exhibit power-law scaling, long-range temporal correlation, and SOC. These networks can be tuned from one to another with voltage as a control parameter. For the first time, different neuron-like networks are realized in a single CMOS compatible, 2D materials platform.
Vivek studied Physics at Cotton University and completed his masters in Solid State Materials from Indian Institute of Technology Delhi, India in 2020. His master’s thesis project was on partial substitution of halide perovskites for stable perovskite solar cell. In August 2021, he joined the Centre for Nanoscience and Engineering, IISc as a PhD student under the supervision of Prof. Pavan Nukala. He is working on stochastic spiking material systems for neuromorphic applications. He is an exchange PhD student at the Chair of Materials Science and Nanotechnology and will work on “Modeling of spatiotemporal patterns in h-BN materials network”
Networks and systems which exhibit brain-like behavior can analyze information from intrinsically noisy and unstructured data with very low power consumption. Such characteristics arise due to the critical nature and complex interconnectivity of the brain and its neuronal network. We demonstrate that a system comprising of multilayer hexagonal Boron Nitride (hBN) films contacted with Silver (Ag), that can uniquely host two different self-assembled networks, which are self-organized at criticality (SOC). This system shows bipolar resistive switching between high resistance (HRS) and low resistance states (LRS). In the HRS, Ag clusters (nodes) intercalate in the van der Waals gaps of hBN forming a network of tunnel junctions, whereas the LRS contains a network of Ag filaments. The temporal avalanche dynamics in both these states exhibit power-law scaling, long-range temporal correlation, and SOC. These networks can be tuned from one to another with voltage as a control parameter. For the first time, different neuron-like networks are realized in a single CMOS compatible, 2D materials platform.
Vivek studied Physics at Cotton University and completed his masters in Solid State Materials from Indian Institute of Technology Delhi, India in 2020. His master’s thesis project was on partial substitution of halide perovskites for stable perovskite solar cell. In August 2021, he joined the Centre for Nanoscience and Engineering, IISc as a PhD student under the supervision of Prof. Pavan Nukala. He is working on stochastic spiking material systems for neuromorphic applications. He is an exchange PhD student at the Chair of Materials Science and Nanotechnology and will work on “Modeling of spatiotemporal patterns in h-BN materials network”
