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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Electron emission from ferroelectric thin films enhanced by the presence of 900; ferroelectric domains
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Electron emission from ferroelectric thin films enhanced by the presence of 900; ferroelectric domains

机译：铁电薄膜的电子发射通过900的存在增强;铁电畴

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摘要

In this work, a ferroelectric domain-enhanced electron emission mechanism is proposed. The polarization distribution near 90deg domain walls is calculated by solving a set of second order differential equations, including the Poisson's one and equations derived from an expansion of the free energy Phi(P) in power series of the polarization according to the Devonshire-Landau-Ginzburg theory. Domain walls intersecting the emitting surface cause sufficient electric fields and lower the potential barrier for electron emission. This induces centers of enhanced electron emission. Relaxing domain walls were found to excite trapped excess electrons in front of the wall.
机译：在这项工作中，提出了一种铁电畴增强的电子发射机构。通过求解一组二阶微分方程来计算90deg畴壁附近的偏振分布，包括泊松的一个等方程，并且根据德斯郡 - Landau的极化的功率系列中的自由能量Phi（P）膨胀。吉茨堡理论。畴壁与发射表面相交，导致足够的电场并降低电子发射的潜在屏障。这诱导了增强的电子发射的中心。发现放松的领域墙壁在墙壁前振荡陷阱过量的电子。

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