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通过控制导线生长来接近长轴晶体类型的memristor的理想线性
Tao Zeng1, Shu Shi1, Kejun Hu2
1Department of Materials Science and Engineering, National University of Singapore, Singapore, 117575, Singapore.
Advanced materials (Deerfield Beach, Fla.)
|May 2, 2024
概括
研究人员开发了一种基于Hf0.5Zr0.5O2的基于神经形态计算的新型记忆器. 该设备实现了高度线性和对称的突触重量调制,克服了传统氧化物记忆器的局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 计算机工程 计算机工程
- 固态物理 固态物理
背景情况:
- 神经形态计算需要节能,并行处理.
- 现有的氧化物memristors遭受非线性和不对称的突触重量调制,复杂的电路设计.
- 控制导电丝的生长对于memristors中的线性导电度调制至关重要.
研究的目的:
- 开发一种具有高度线性和对称的导电度调制的memristor,以改进神经形态计算.
- 研究一种方法来控制氧化物基的memristors中的导电丝的生长.
- 展示开发的memristor在十进制运算和神经网络中的应用.
主要方法:
- Hf0.5Zr0.5O2薄膜的表层生长.
- 插入一个铜 (Cu) 纳米粒子层,以创建谷物边界并破坏表轴生长.
- 使用局部电场增强来限制丝生长在粒边界内.
主要成果:
- 实现了基于Hf0.5Zr0.5O2的memristor,其线性和对称性接近理想.
- 证明控制的丝生长仅限于粒度边界,抑制随机行为.
- 成功实现了十进制运算和使用memristor调制能力的高精度神经网络.
结论:
- 工程粒度边界有效地控制了Hf0.5Zr0.5O2的导电丝的生长.
- 这种方法显著提高了线性和对称性,这对于高级神经形态应用来说至关重要.
- 开发的memristor技术对抗随机访问存储器 (RRAM) 和受大脑启发的计算具有前景.
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