Converse-piezoelectric effect on current-voltage characteristics of symmetric ferroelectric tunnel junctions
Converse-piezoelectric effect on current-voltage characteristics of symmetric ferroelectric tunnel junctions
复制标题
逆压电效应对对称铁电隧道结电流-电压特性的影响
DOI：
10.1063/1.3673600
复制
发表时间：
2012-01-01
影响因子：
3.2
通讯作者：
Li, Hui
中科院分区：
文献类型：
--
作者：
Lu, Xiaoyan;Cao, Wenwu;Li, Hui
考虑厚度和应变相关的逆压电效应，研究了超薄铁电势垒中对称铁电隧道结的电流-电压特性。在适当的边界条件下，当铁电势垒厚度在临界厚度附近时，可以实现较大的压电应变。由于隧道电流与有效薄膜厚度呈指数关系，外加电场和衬底感应应变可以大大增强隧道电流。
Current-voltage characteristics of symmetric ferroelectric tunnel junction were studied in an ultrathin ferroelectric barrier with the consideration of the thickness and strain dependent converse-piezoelectric effect. With proper boundary conditions, large piezoelectric strain can be achieved in the ferroelectric barrier when its thickness is in the vicinity of the critical thickness. Because of the exponential relationship between the tunneling current and the effective film thickness, tunneling current can be greatly enhanced by the external electric field and substrate induced strain.