论文标题
在压电硅酸盐晶体中，移位光伏电流和磁诱导的散装光电流
The shift photovoltaic current and magnetically-induced bulk photocurrent in piezoelectric sillenite crystals
论文作者
论文摘要
最近，已经显示了如何在圆形电流的圆形电流的转移组成的假设下，可以将压电硅酸盐晶体中的变化和弹道电流如何在实验中分离为实验。但是，由于磁场效应是由磁场中晶体的空间对称性的变化或破坏时间转换对称性的变化而引起的，因此该方法无法通过此方法量化偏移和弹道电流。目前，我们报告了BI $ _ {12} $ sio $ _ {20} $中光伏电流的观察，在弱外部磁场下线性和圆形光线激发，以及对相应的照片霍尔信号的测量。我们证明，磁电流电流在特定的实验条件下，占Bi $ _ {12} $ sio $ _ {20} $的大厅方向测量电流的很大一部分。
Recently, it has been shown how shift and ballistic currents in piezoelectric sillenite crystals Bi$_{12}$GeO$_{20}$ and Bi$_{12}$SiO$_{20}$ can be separated experimentally under the assumption that the shift component of the circular current is small. However, it has been claimed that the shift and ballistic currents cannot be quantified by this method, due to the magneto-photovoltaic effect caused either by the change of the crystal's spatial symmetry in the magnetic field or by the breaking of time-reversal symmetry. Presently, we report observations of photovoltaic currents in Bi$_{12}$SiO$_{20}$, excited by linearly- and circularly-polarized light under weak external magnetic field, as well as measurements of the corresponding photo-Hall signals. We demonstrate that the magneto-photovoltaic current constitutes a significant fraction of the measured current in the Hall direction for Bi$_{12}$SiO$_{20}$ under specific experimental conditions.
