期刊
NANOSCALE RESEARCH LETTERS
卷 15, 期 1, 页码 -出版社
SPRINGEROPEN
DOI: 10.1186/s11671-020-3249-7
关键词
Analog switching; Synaptic characteristics; Ag; SiOx; Ag; TiOx; p(++)-Si memristor; Ag-filament
资金
- National Natural Science Foundation of China [61421002]
In this study, by inserting a buffer layer of TiOx between the SiOx:Ag layer and the bottom electrode, we have developed a memristor device with a simple structure of Ag/SiOx:Ag/TiOx/p(++)-Si by a physical vapor deposition process, in which the filament growth and rupture can be efficiently controlled during analog switching. The synaptic characteristics of the memristor device with a wide range of resistance change for weight modulation by implementing positive or negative pulse trains have been investigated extensively. Several learning and memory functions have been achieved simultaneously, including potentiation/depression, paired-pulse-facilitation (PPF), short-term plasticity (STP), and STP-to-LTP (long-term plasticity) transition controlled by repeating pulses more than a rehearsal operation, and spike-time-dependent-plasticity (STDP) as well. Based on the analysis of logarithmic I-V characteristics, it has been found that the controlled evolution/dissolution of conductive Ag-filaments across the dielectric layers can improve the performance of the testing memristor device.
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