Affiliation:
1. Research Institute for Convergence of Basic Science Division of Nano‐Scale Semiconductor Engineering Hanyang University Seoul 04763 South Korea
2. Research Institute of Natural Science Department of Physics Hanyang University Seoul 04763 South Korea
3. Department of Physics and New and Renewable Energy Research Center Ewha Womans University Seoul 03760 South Korea
4. Department of Physics Ewha Womans University Seoul 03760 South Korea
Abstract
AbstractAdvanced resistive random‐access memory (ReRAM) devices based on resistive switching (RS) have been intensely studied for future high‐density nonvolatile memory devices owing to their high scalability, simplified integration, fast operation, and ultralow power consumption. Among the recently considered active media, diverse carbon‐based media have emerged because of numerous benefits of simple chemical composition, desirable speed, and cost‐effective scalability. However, these media are still susceptible to undesirable reliability issues, including poor endurance and retention and uncontrollable operation voltage distribution. In this study, an oxynitride amorphous carbon active medium governed by appropriate nitrogen content during growth is introduced to facilitate high electrical stability, such as a distinct pulse endurance of more than 107 cycles, a high retention time of 105 s at 85 °C, and increased uniformity in the SET/RESET distribution with thermally robust RS stability even at a high annealing temperature of 400 °C. The findings are possibly the result of adapting an sp2–sp3 conversion nature assisted by the presence of pyridinic N or pyrrolic N as a substitution reaction.
Subject
Electronic, Optical and Magnetic Materials