Multi-field modulation of ferroelectric films
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摘要: 铁电薄膜在非易失随机存储器、压电器件、热释电器件和电光器件中有着广泛的应用。由于极化—晶格—电荷自由度的强烈耦合，铁电薄膜的特性不仅可以被电场调控，也可以被多种其他外场调控。文章分别阐述了电场、力场和光场对铁电薄膜极化和导电特性的调控作用及物理机制，并展示了电驱动、机械驱动和光驱动等新型铁电器件的应用潜力。多种外场的调控作用可以突破传统电场调控在电路接入和击穿、漏电等失效行为方面的限制，为铁电器件的设计提供新思路。Abstract: Ferroelectric thin films have been widely used in non-volatile random-access memories, piezoelectric devices, pyroelectric devices and electro-optical devices. Due to the strong coupling among polarization, lattice and charge degrees of freedom, the properties of ferroelectric thin films can be tuned not only by an electric field, but also by multiple external fields. In this paper, the electrical, mechanical and optical modulations of the properties of ferroelectric thin films (i.e., polarization and conductivity) are discussed, as well as the physical mechanisms and their potential applications. The multi-field modulated ferroelectric films can overcome the limitations of traditional electric field driven devices, and provide new ideas for the design of multi-field driven ferroelectric devices.
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Keywords:
- multi-field modulation /
- ferroelectric films /
- ferroelectric devices
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