一个分层的宽带间隔BiOF门介电器,具有高介电常数.
Jiabiao Chen1, Xinyue Dong2,3, Yameng Hou1,4
1Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, School of Materials Science and Engineering, Nankai University, Tianjin 300350, China.
氧化 (BiOF) 为半导体缩放挑战提供了解决方案,提供了宽带间隙和高介电常数. 这种新型材料提高了二维 (2D) 设备的性能,克服了传统材料的局限性.
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
- 纳米技术 纳米技术
背景情况:
- 半导体设备缩小规模需要带宽宽的门介电材料和高的介电常数.
- 传统绝缘体面临的是带隙和介电反应之间的权衡,这限制了性能.
研究的目的:
- 为了识别和描述一种超越带隙-介电常量权衡的新型介电材料.
- 为这种新的介电材料开发可扩展的合成方法.
- 为了证明其在增强二维 (2D) 电子设备中的应用.
主要方法:
- 通过可扩展的固态路径合成相纯 bismuth oxyfluoride (BiOF) 粉末.
- 化学蒸汽沉积 (CVD) 用于生长超薄的BIOF纳米片.
- 整合BiOF与几层石墨烯用于设备制造和表征.
主要成果:
- 石氧化物 (BiOF) 具有宽带间隙 (E_g ≈ 4.5 eV) 和高平面外介电常数 (κ = 22.5).
- 超薄的BIOF纳米板具有稳定的介电特性和惰性范德瓦尔斯 (vdW) 表面.
- 生物OF封装的石墨烯显示出优越的电子霍尔流动性 (μ_e,2K ≈ 134,000 cm2 V−1 s−1) 和舒布尼科夫-德哈斯振荡.
结论:
- BiOF是一种有前途的高κ介电材料,可以克服带隙和介电常数之间的内在权衡.
- 它的特性促进了与二维材料的无集成,提高了设备的性能.
- 这项工作扩展了用于先进电子应用的VDW材料库.
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