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在薄膜中控制基质的响应系数

Marina Tyunina^1,2, Leonid L Rusevich³, Maxim Savinov²

¹Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, P. O. Box 4500, Oulu, FI-90014, Finland.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|August 20, 2025

概括

薄膜中的基板应变会改变原子振动,从而使材料具有可调的特性. 这一发现允许新的方法来控制物质对外界刺激的反应,

科学领域:

材料科学
凝聚物质物理学
固态化学

背景情况:

改变材料组成是实现所需性能的主要方法.
薄膜提供了独特的途径,
矿氧化物和铁电物是具有可调节反应的重要材料类.

研究的目的:

提出一种新的方法,以在薄膜中实现对外部刺激的优异材料反应.
研究基板对薄膜中的原子振动的影响.
证明材料反应系数的应变性.

主要方法:

使用最先进的第一原则计算.
在酸薄膜上进行实验研究.
理论上证明并经过实验验证的依赖应变的库里常数.

主要成果:

基板诱导的应变显著改变了薄膜中的原子振动频率和强度.
发现材料特异性反应-刺激系数依赖于应变.
库里常数是对热刺激的介电反应的度量,显示了应变依赖性.

结论:

原子振动从根本上决定了各种材料的反应系数.
通常由基板变形的薄膜提供了一个控制原子振动的平台.
在薄膜中引发原子振动的基板控制可以导致前所未有的材料反应.

关键词:

计算方法凝聚物质物理铁电器物理与工程

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