Author:
Ha Hoesung,Pyo Juyeong,Lee Yunseok,Kim Sungjun
Abstract
In this study, we investigate the synaptic characteristics and the non-volatile memory characteristics of TiN/CeOx/Pt RRAM devices for a neuromorphic system. The thickness and chemical properties of the CeOx are confirmed through TEM, EDS, and XPS analysis. A lot of oxygen vacancies (ions) in CeOx film enhance resistive switching. The stable bipolar resistive switching characteristics, endurance cycling (>100 cycles), and non-volatile properties in the retention test (>10,000 s) are assessed through DC sweep. The filamentary switching model and Schottky emission-based conduction model are presented for TiN/CeOx/Pt RRAM devices in the LRS and HRS. The compliance current (1~5 mA) and reset stop voltage (−1.3~−2.2 V) are used in the set and reset processes, respectively, to implement multi-level cell (MLC) in DC sweep mode. Based on neural activity, a neuromorphic system is performed by electrical stimulation. Accordingly, the pulse responses achieve longer endurance cycling (>10,000 cycles), MLC (potentiation and depression), spike-timing dependent plasticity (STDP), and excitatory postsynaptic current (EPSC) to mimic synapse using TiN/CeOx/Pt RRAM devices.
Funder
National Research Foundation of Republic of Korea
Korea Institute of Energy Technology Evaluation and Planning
Subject
General Materials Science
Reference48 articles.
1. Memory Materials and Devices: From Concept to Application;Zhang;InfoMat,2020
2. The Internet of Things: A Survey;Atzori;Comput. Netw.,2010
3. Resistive Random Access Memory (RRAM): An Overview of Materials, Switching Mechanism, Performance, Multilevel Cell (Mlc) Storage, Modeling, and Applications;Zahoor;Nanoscale Res. Lett.,2020
4. Transferable and Flexible Artificial Memristive Synapse Based on WOx Schottky Junction on Arbitrary Substrates;Lin;Adv. Electron. Mater.,2018
5. Memristive Synapses with Photoelectric Plasticity Realized in ZnO1−x/AlOy Heterojunction;Hu;ACS Appl. Mater. Interfaces,2018
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