噪声指纹作为一个量化顺序参数,用于哈夫尼亚铁电公司的偏振和缺陷介导切换
Ryun-Han Koo1, Jiseong Im1, Joon Hwang1
1Department of Electrical and Computer Engineering and Inter-University Semiconductor Research Center (ISRC), Seoul National University, Seoul, South Korea.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|February 8, 2026
概括
低频噪声量化了哈夫尼亚铁电器中的切换机制. 该方法区分了以偏振介导 (P-RS) 和缺陷介导 (D-RS) 的电阻切换,以帮助设备设计.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 电气工程 电气工程
背景情况:
- 铁电哈夫尼亚表现出复杂的电阻切换 (RS) 行为.
- 区分分极化介导 (P-RS) 和缺陷介导 (D-RS) 切换是至关重要的,但具有挑战性.
- 关于P-RS和D-RS机制共存的先前证据在很大程度上是定性的.
研究的目的:
- 开发一种定量方法来解开哈夫尼亚铁电器中的P-RS和D-RS机制.
- 调查加工条件,特别是氧气静脉测量对切换路径之间的竞争的影响.
- 为优化基于哈夫尼亚的铁电设备提供实用指南.
主要方法:
- 使用低频噪声 (LFN) 作为定量顺序参数.
- 应用一个具有单调基线和交替投影的解卷框架来分析噪声频谱.
- 在HfZrO的原子层沉积 (ALD) 过程中系统地改变氧 (O3) 剂量时间.
- 在程序偏差 (VPGM) 中分析正常化的功率光谱密度 (SI/I^2).
主要成果:
- 证明LFN可以从数量上区分P-RS和D-RS.
- 观察到在正常化的功率光谱密度中具有一致的上升-峰值-下降概况,随着O3剂量的变化.
- 开发了过程偏差图,显示降低O3剂量会将P-RS/D-RS交叉转移到降低VPGM并加快过渡.
- 建立了氧气固体测量与切换路径之间的竞争之间的直接联系.
结论:
- 成功解决了关于哈夫尼亚铁电公司P-RS和D-RS共存的长期争议.
- 开发的基于LFN的定量方法为分析铁电切换动态提供了强大的工具.
- 为改进的基于 hafnia 的内存和逻辑设备的有针对性的设计和制造提供了实用的见解.
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