揭示了基于氧气工程的氧化物RRAM设备中电压诱导的导电量变化的量子性质
F L Aguirre1,2, E Piros3, N Kaiser4
1Departament d'Enginyeria Electrònica, Universitat Autònoma de Barcelona, 08193, Cerdanyola del Valles, Spain. aguirref@ieee.org.
Scientific reports
|January 11, 2024
概括
在氧化记忆器件中的电阻切换显示了电导率在量子电导率单位 (G0) 附近的电导率变化. 这种量子行为在所有设备上都是一致的,无论氧气度如何.
科学领域:
- 固态物理 固态物理
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 电阻随机存储器 (RRAM) 设备对于下一代电子产品至关重要.
- 了解RRAM中基本的传输机制对于设备优化至关重要.
- 在氧化 (YO) 薄膜中的氧化工程会影响它们的电特性.
研究的目的:
- 调查基于YO的RRAM在电流电压 (I-V) 特性中的准模拟到离散过渡.
- 专注于在重置过程中电导变化的大小,而不是绝对值.
- 确定这些导电性变化是否是量化和可重现的.
主要方法:
- 用氧气工程制造的氧化薄膜的制造.
- 电阻随机存储器 (RRAM) 设备的电流-电压 (I-V) 性能的表征.
- 在重置过渡过程中对电导率的变化进行分析,特别是它们的相对于电导率的量子单位 (G0) 的大小.
主要成果:
- 在重置过程中的导电量变化主要是导电量的量子单位 (G0 = 2e2/h) 的顺序.
- 这种量子化行为甚至在显著高于G0的导电量水平上也被观察到,这表明在看似扩散的运输中存在潜在的量子效应.
- 电导率变化的大小 (~1 G0) 与YO层中的氧度和电压扫描率不变.
结论:
- 基于YO的RRAM设备的重置过程显示出接近G0.0的量子导电率变化.
- 缺氧会影响量子化状态的数量,但不会影响这些基本导电性步骤的数量.
- 这一发现为切换机制和RRAM设备中的量子传输潜力提供了关键的见解.
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