Resistance Switching Behavior in Rectangle-Nano-Pattern SrTiO3 Induced by Simple Annealing

Resistance Switching Behavior in Rectangle-Nano-Pattern SrTiO3 Induced by Simple Annealing
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简单退火引起的矩形纳米图案 SrTiO3 的电阻切换行为

DOI:
10.3390/ma12223698
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发表时间:
2019-11
期刊:
影响因子:
3.4
通讯作者:
Wang Huiqiong
Wang Huiqiong
中科院分区:
材料科学3区
文献类型:
--
作者:
Liao Xiaxia;Zhang Yufeng;Wang Jiaou;Kang Junyong;Zhang Jinbin;Wang Jizheng;Zheng Jincheng;Wang Huiqiong

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通过简单的氩气气氛下封装退火方法,实现了 SrTiO3 单晶衬底半导体电导率的可调性。这种高温退火引起的性能变化可通过透射光谱、扫描电子显微镜 (SEM) 和基于同步加速器的 X 射线吸收 (XAS) 来表征。我们发现光学性能受到退火时间的强烈影响(透射率显着降低)。检测到约 427 nm 处的亚间隙吸收,这是由于氧空位的引入所致。有趣的是,在 SEM 图像中,可以直接观察到退火引起的规则矩形纳米图案,这有助于导电丝的形成。 O K 边光谱的 XAS 显示了退火过程中电子结构的变化。非常重要的是,退火后的 SrTiO3 单晶显示出电阻切换响应。这提出了一种可能的简化途径来调节 SrTiO3 的电导率并进一步开发新型电阻开关材料。
The tunability of semi-conductivity in SrTiO3 single crystal substrates has been realized by a simple encapsulated annealing method under argon atmosphere. This high temperature annealing-induced property changes are characterized by the transmission spectra, scanning electron microscopy (SEM) and synchrotron-based X-ray absorption (XAS). We find the optical property is strongly influenced by the annealing time (with significant decrease of transmittance). A sub gap absorption at ~427 nm is detected which is attributed to the introduction of oxygen vacancy. Interestingly, in the SEM images, annealing-induced regularly rectangle nano-patterns are directly observed which is contributed to the conducting filaments. The XAS of O K-edge spectra shows the changes of electronic structure by annealing. Very importantly, resistance switching response is displayed in the annealed SrTiO3 single crystal. This suggests a possible simplified route to tune the conductivity of SrTiO3 and further develop novel resistance switching materials.
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