通过控制相位和自组装纳米通道在HfO2中的多级电阻切换动力学
Tanmayee Parida1, Minh Anh Luong2, Santanu Das3
1Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, Gautam Buddha Nagar, Uttar Pradesh, 201314, India.
Small (Weinheim an der Bergstrasse, Germany)
|December 5, 2024
概括
通过基板温度控制HfO2膜中的氧气空缺,可以在电阻开关装置中准确地形成导电丝. 这一突破增强了高级内存应用的多级电阻切换.
科学领域:
- 材料科学 材料科学 材料科学
- 固态电子 固态电子
- 纳米技术纳米技术
背景情况:
- 电阻开关设备为高密度内存和内存计算提供了潜力.
- 控制导电丝 (CF) 演变对于实用的电阻随机存储器 (RRAM) 至关重要,但仍然具有挑战性.
- 现有的离子迁移和电化学切换机制需要精确控制材料特性.
研究的目的:
- 系统调节HfO2膜中的氧空缺 (OV),以控制CF的形成.
- 为了研究基板温度对OV度和RRAM设备性能的影响.
- 探索多层电阻开关和多位数据存储的潜力.
主要方法:
- 制造基于Ag/HfO2/Pt的RRAM设备,使用不同的基板温度.
- 在不同生长温度下对HfO2薄膜相和氧空隙度的表征.
- 电气测试用于评估电阻切换行为,包括多层切换,耐力和保留.
主要成果:
- 在300°C生长的HfO2膜表现出具有最大OV度的单临床阶段,这对于最佳切换至关重要.
- 在HfO2中自组装的纳米通道引导了CF的演变,Ag扩散表明OV和Ag+离子迁移之间的协同效应.
- 实现了大约8000的令人印象深刻的开启/关闭阻力比 (R_on/R_off),解决了耐力/保留权衡问题.
结论:
- 基质温度控制是一种有效的方法来调节OV,并在基于HfO2的RRAM中实现精确的CF形成.
- 这项研究表明,基于氧化物的高性能RRAM具有多层切换能力的可行方法.
- 研究结果提供了对多层切换机制的见解,为未来的低功耗,高密度内存技术铺平了道路.
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