漏铁电体 BiFeO(3)中的空间分辨光探测。
Spatially resolved photodetection in leaky ferroelectric BiFeO(3).
机构信息
Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang, Gyungbuk, Korea.
出版信息
Adv Mater. 2012 Mar 8;24(10):OP49-53. doi: 10.1002/adma.201102816. Epub 2012 Jan 27.
PMID:22282134
Abstract
Potential gradients due to the spontaneous polarization of BiFeO(3) yield asymmetric and nonlinear photocarrier dynamics. Photocurrent direction is determined by local ferroelectric domain orientation, whereas magnitude is spectrally centered around charged domain walls that are associated with oxygen vacancy migration. Photodetection can be electrically controlled by manipulating ferroelectric domain configurations.
摘要
由于 BiFeO(3) 的自发极化产生的电势梯度导致了不对称和非线性的光载流子动力学。光电流的方向由局域铁电畴取向决定，而幅度则以与氧空位迁移相关的带电畴壁为中心分布在光谱上。通过操纵铁电畴结构，可以实现对光探测的电控制。
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