修正肖特基发射解释BaTiO $_3$纳米线的厚度依赖性和缓慢去极化
Modiffied Schottky emission to explain thickness dependence and slow depolarization in BaTiO$_3$ nanowires
摘要：
我们调查的起源，退极化率的吸附物稳定的铁电线。通过应用密度泛函理论计算和解析建模，我们证明了退极化是由于表面吸附物上储存的电荷泄漏所致，这些电荷在极化稳定中起着重要作用。退极化速度随厚度和温度变化，遵循几个复杂的趋势。提出了一个综合考虑量子隧穿、肖特基发射和温度依赖的电子迁移率的物理模型。该模型模拟了实验结果，验证了物理机制。我们还期望这种改进的隧穿-肖特基发射模型可以应用于预测不同厚度和温度的各种铁电材料的极化保留时间和漏电流。
英文摘要：
We investigate the origin of the depolarization rates in ultrathin adsorbate-stabilized ferroelectric wires. By applying density functional theory calculations and analytic modeling, we demonstrate that the depolarization results from the leakage of charges stored at the surface adsorbates, which play an important role in the polarization stabilization. The depolarization speed varies with thickness and temperature, following several complex trends. A comprehensive physical model is presented, in which quantum tunneling, Schottky emission and temperature dependent electron mobility are taken into consideration. This model simulates experimental results, validating the physical mechanism. We also expect that this improved tunneling-Schottky emission model could be applied to predict the retention time of polarization and the leakage current for various ferroelectric materials with different thicknesses and temperatures.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
