Resistance Drift Convergence and Inversion in Amorphous Phase Change Materials

Julian Pries; Christian Stenz; Lisa SchaeferAlexander GutscheShuai WeiPierre LucasMatthias Wuttig

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Resistance Drift Convergence and Inversion in Amorphous Phase Change Materials

机译：Resistance Drift Convergence and Inversion in Amorphous Phase Change Materials

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Phase change materials (PCMs) are key to the development of artificial intelligence technologies such as high-density memories and neuromorphic computing, thanks to their ability for multi-level data storage through stepwise resistive encoding. Individual resistance levels are realized by adjusting the crystalline and amorphous volume fraction of the memory cell. However, the amorphous phase exhibits a drift in resistance over time that has so far hindered the commercial implementation of multi-level storage schemes. In this study, the underlying physical process of resistance drift with the goal of modeling is elucidated that will help minimize and potentially overcome drift in PCM memory devices. Clear evidence is provided that the resistance drift is dominated by glass dynamics. Resistivity convergence and drift inversion for the amorphous chalcogenide Ge_(15)Te_(85) and the PCM Ge_3Sb_6Te_5 are experimentally demonstrated and these changes are successfully predicted with a glass dynamics model. This new insight into the resistance drift process provides tools for the development of advanced PCM devices.

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《Advanced functional materials》 |2022年第48期|2207194.1-2207194.9|共9页
作者
Julian Pries; Christian Stenz; Lisa SchaeferAlexander GutscheShuai WeiPierre LucasMatthias Wuttig;
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作者单位

Institute of Physics IA RWTH Aachen University 52074 Aachen, Germany;

PGI-10 Forschungszentrum Juelich 52425 Juelich, Germany;

Department of Chemistry Aarhus University DK-8000 Aarhus-C, DenmarkDepartment of Materials Science and Engineering University of Arizona Tucson, AZ 85721, USAInstitute of Physics IA RWTH Aachen University 52074 Aachen, Germany,PGI-10 Forschungszentrum Juelich 52425 Juelich, Germany;

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正文语种英语
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data storages; glass dynamics; phase change materials; rejuvenation; resistance drifts; structural relaxations;

Resistance Drift Convergence and Inversion in Amorphous Phase Change Materials

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