Kim, Ji Eun Kwon, Jae Uk Chun, Suk Yeop Song, Young Geun Jeong, Doo Seok Kang, Chong-Yun Kim, Seong Keun Nahm, Sahn Yoon, Jung Ho 2024-01-19T11:03:07Z 2024-01-19T11:03:07Z 2022-07-08 2022-10 2199-160X https://pubs.kist.re.kr/handle/201004/114535 Mobile species and matrix materials in ion motion-mediated memristors predominantly determine the switching characteristics and device performance. As a result of exploring a new type of mobile species, a Ru ion-mediated electrochemical metallization-like memristor with an amorphous oxide matrix is recently suggested to achieve a low switching current, voltage, and good retention simultaneously. Although the ion migration of Ru in the oxide matrix is previously confirmed, no in-depth study on how the crystallinity of the oxide matrix influences the Ru ion motion and switching characteristics has not been reported. Therefore, in this study, the crystallinity-dependent resistive switching behavior of the Pt/HfO2/Ru structure device is investigated. With the crystallized HfO2 layer, the preferred Ru ion migration through the grain boundaries occurs owing to the enhanced ion mobility, resulting in a high switching current (approximate to 100 mu A) with continuous metallic Ru conducting filaments. The discontinuous conducting filaments with amorphous HfO2 exhibit a low switching current. In addition, highly linear and symmetric conductance modulation properties are achieved, and over 91.5% accuracy in the Mixed National Institute of Standards and Technology (MNIST) pattern recognition test is demonstrated. English Wiley-VCH Verlag Low Energy and Analog Memristor Enabled by Regulation of Ru ion Motion for High Precision Neuromorphic Computing Article 10.1002/aelm.202200365 1 Advanced Electronic Materials, v.8, no.10 Advanced Electronic Materials 8 10 N scie scopus 000817811000001 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Science & Technology - Other Topics Materials Science Physics Article THIN-FILMS RESISTANCE TRANSITION MECHANISMS crystallinity-dependent low currents memristors analog switching conductance modulation