Evidence of Filamentary Switching in Oxide-based Memory Devices via Weak Programming and Retention Failure Analysis

Scientific Reports
Adnan YounisSean Li

Abstract

Further progress in high-performance microelectronic devices relies on the development of novel materials and device architectures. However, the components and designs that are currently in use have reached their physical limits. Intensive research efforts, ranging from device fabrication to performance evaluation, are required to surmount these limitations. In this paper, we demonstrate that the superior bipolar resistive switching characteristics of a CeO2:Gd-based memory device can be manipulated by means of UV radiation, serving as a new degree of freedom. Furthermore, the metal oxide-based (CeO2:Gd) memory device was found to possess electrical and neuromorphic multifunctionalities. To investigate the underlying switching mechanism of the device, its plasticity behaviour was studied by imposing weak programming conditions. In addition, a short-term to long-term memory transition analogous to the forgetting process in the human brain, which is regarded as a key biological synaptic function for information processing and data storage, was realized. Based on a careful examination of the device's retention behaviour at elevated temperatures, the filamentary nature of switching in such devices can be understood from a new persp...Continue Reading

References

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Mar 9, 2013·ACS Applied Materials & Interfaces·Adnan YounisSean Li
Sep 14, 2013·ACS Applied Materials & Interfaces·Adnan YounisSean Li
Jan 13, 2015·ACS Nano·Selina La BarberaFabien Alibart
Jan 20, 2015·Scientific Reports·Kyung Min KimCheol Seong Hwang

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Citations

Feb 26, 2016·Neuropharmacology·Charissa PoonKullervo Hynynen
Apr 17, 2018·Physical Chemistry Chemical Physics : PCCP·Pjotrs A ŽgunsNatalia V Skorodumova
Sep 28, 2017·Physical Chemistry Chemical Physics : PCCP·Pjotrs A ŽgunsNatalia V Skorodumova
May 4, 2021·Advanced Materials·Adnan YounisTom Wu

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Methods Mentioned

BETA
transmission electron microscopy
X-ray

Software Mentioned

Nova

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