期刊
ADVANCED ELECTRONIC MATERIALS
卷 7, 期 5, 页码 -出版社
WILEY
DOI: 10.1002/aelm.202001258
关键词
first‐ principles calculations; high‐ entropy oxides; memristors; neuromorphic computing; pulsed laser deposition
资金
- National Science Foundation [DMR-1810119, ACI-1548562]
- University of Michigan College of Engineering
- NSF [DMR-0420785]
High-entropy-oxide-based memristors composed of Zr, Hf, Nb, Ta, Mo, and W oxides demonstrate uniform distribution of vacancies and low stochastic behavior in resistive switching, showing promise for neuromorphic applications. These memristors exhibit forming-free operation, low device and cycle variability, gradual conductance modulation, 6-bit operation, and long retention.
Memristors have emerged as transformative devices to enable neuromorphic and in-memory computing, where success requires the identification and development of materials that can overcome challenges in retention and device variability. Here, high-entropy oxide composed of Zr, Hf, Nb, Ta, Mo, and W oxides is first demonstrated as a switching material for valence change memory. This multielement oxide material provides uniform distribution and higher concentration of oxygen vacancies, limiting the stochastic behavior in resistive switching. (Zr, Hf, Nb, Ta, Mo, W) high-entropy-oxide-based memristors manifest the cocktail effect, exhibiting comparable retention with HfO2- or Ta2O5-based memristors while also demonstrating the gradual conductance modulation observed in WO3-based memristors. The electrical characterization of these high-entropy-oxide-based memristors demonstrates forming-free operation, low device and cycle variability, gradual conductance modulation, 6-bit operation, and long retention which are promising for neuromorphic applications.
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