Space-charge-limited leakage current in high dielectric constant and ferroelectric thin films considering the field-dependent permittivity

作者：Sun, J^*; Zheng, X J; Yin, W; Tang, M H; Li, W

来源：Applied Physics Letters, 2010, 97(24): 242905.

DOI：10.1063/1.3525711

Distinguishing from the traditional characterization on high-field leakage current density-voltage relationship, the field-dependent permittivity from the polarization derivative is used to solve the space-charge-limited conduction, and the simulated leakage current densities are compared with the previous experimental observations. The influences of the mobility, ferroelectric parameters, and film thickness on the leakage current densities are discussed. The results verify that the high-field quasi-Ohmic region observed experimentally may result from the field-dependent permittivity, and that the leakage current can be influenced by the ferroelectric polarization.

• 出版日期2010-12-13
• 单位湘潭大学