Pressure-Induced Ionic-Electronic Transition in BiVO4
Pressure-Induced Ionic-Electronic Transition in BiVO4
复制标题
BiVO4 中压力诱导的离子电子跃迁
DOI:
10.1088/0256-307x/36/7/077202
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发表时间:
2019-06
影响因子:
3.5
通讯作者:
Han Yong-Hao
中科院分区:
文献类型:
--
作者:
Lyu Shu-Peng;Wang Jia;Zhang Guo-Zhao;Wang Yu-Fei;Wang Min;Liu Cal-Long;Gao Chun-Xiao;Han Yong-Hao
Electrical transport properties of bismuth vanadate (BiVO 4 ) are studied under high pressures with electrochemical impedance spectroscopy. A pressure-induced ionic-electronic transition is found in BiVO 4. Below 3.0 GPa, BiVO 4 has ionic conduction behavior. The ionic resistance decreases under high pressures due to the increasing migration rate of O 2− ions. Above 3.0 GPa the channels for ion migration are closed. Transport mechanism changes from the ionic to the electronic behavior. First-principles calculations show that bandgap width narrows under high pressures, causing the continuous decrease of electrical resistance of BiVO 4.
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