SiO2/Si接口的缺陷特征通过漂移辅助正子灭寿命光谱学进行调查
Ricardo Helm1, Werner Egger1, Catherine Corbel2
1Institute for Applied Physics and Measurement Technology, University of the Bundeswehr Munich, 85579 Munich, Germany.
Nanomaterials (Basel, Switzerland)
|February 12, 2026
概括
这项研究使用电场来控制金属氧化物电容器中的正电子行为,揭示了不同的接口缺陷及其在不同电条件下的捕获变化.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 表面科学是一门学科.
背景情况:
- 定子灭绝寿命光谱 (PALS) 是一种强大的技术,用于检测材料中的缺陷.
- 了解二氧化/ (SiO2/Si) 接口上的缺陷对于半导体设备的性能至关重要.
- 应用电场可以影响带电粒子的运输,但它们对靠近接口的正子子行为的影响较少被探索.
研究的目的:
- 为了研究应用电场对质子空间分布和消灭特性在p型 (100) 金属氧化 (MOS) 电容器中的影响.
- 确定正子漂移运输参数,并分析电场对SiO2/Si接口中的正子捕获的影响.
- 描述SiO2/Si接口两侧缺陷的性质及其对MOS设备操作的依赖.
主要方法:
- 在p型 (100) MOS电容器上进行了漂移辅助正子灭绝寿命光谱 (PALS).
- 应用的电场变化以诱导积累,耗尽和反转条件.
- 分析了正子生命周期光谱,以提取漂移运输参数和缺陷信息.
主要成果:
- 内部电场有效地控制了正子漂移,增强或阻碍它们向SiO2/Si接口扩散.
- 从生命周期数据中成功地得出了关键正子漂移运输参数.
- 在接口的对面发现了不同的缺陷类型,空虚类型和空缺类型 (Pb中心).
- 发现Pb中心的捕获行为取决于充电状态,这取决于MOS设备操作模式.
结论:
- 漂移辅助PALS在探测正子和SiO2/Si接口上的缺陷的复杂行为方面是有效的.
- SiO2 / Si接口表现出不对称的缺陷特征,在和氧化物方面存在不同的缺陷类型.
- 在变化的电场下,接口缺陷的电荷状态调制显著影响正电子捕获,为缺陷动态提供了洞察力.
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