高-κ介电 (HfO2)/2D半导体 (HfSe2) 门堆用于低功率急切换计算设备
Taeho Kang1,2, Joonho Park3, Hanggyo Jung4
1SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 16419, South Korea.
Advanced materials (Deerfield Beach, Fla.)
|March 26, 2024
概括
研究人员使用等离子体氧化方法开发了一种高质量的二氧化 (HfO2) 门堆在二维二氧化 (HfSe2) 上. 这一突破使得原子利的接口和先进的切换晶体管可以用于节能电子产品.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 纳米技术 纳米技术
背景情况:
- 先进的网关堆对于下一代半导体设备至关重要.
- 二维 (2D) 材料提供独特的电子特性,但需要高质量的接口.
- 基于哈夫尼的材料对高-κ介电材料具有前景.
研究的目的:
- 为了制造和表征一个高质量的HfO2/HfSe2门.
- 为了研究接口特性和介电性能.
- 为了证明后电子产品的急切切换晶体管特性.
主要方法:
- 在2D HfSe2.2.上对HfO2门介电形成的等离子氧化.
- 密度函数理论 (DFT) 计算用于接口机制分析.
- 场效应晶体管 (FET) 和冲击电离 FET 的制造和表征.
主要成果:
- 实现了一个原子敏的HfO2/HfSe2接口,接口陷密度低 (Dit ≈ 5 × 10^10 cm^-2 eV^-1).
- 在相应的氧化物厚度为0.5 nm时,HfO2表现出高的介电常数 (κ ≈ 23) 和低的泄漏电流 (≈10^-3 A cm^-2).
- 证明了具有理想下值斜率 (SS ≈61 mV dec^-1) 和高离子/离子比率 (≈10^8) 的FET.
- 制造的冲击电离FET具有急切换特征 (SS = 3.43 mV dec^-1),超过了博尔兹曼极限.
结论:
- 等离子体氧化使高质量的HfO2/HfSe2门堆能够具有卓越的接口特性.
- 开发的门适用于先进的晶体管应用,包括切换设备.
- 这项工作代表了对后,节能计算电子技术的重大进步.
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