论文摘要
Electrical transport properties of bismuth vanadate（BiVO4） are studied under high pressures with electrochemical impedance spectroscopy. A pressure-induced ionic-electronic transition is found in BiVO4. Below 3.0 GPa, BiVO4 has ionic conduction behavior. The ionic resistance decreases under high pressures due to the increasing migration rate of O2-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 BiVO4.
论文目录
文章来源
类型: 期刊论文
作者: 吕舒鹏,王佳,张国召,王宇飞,王敏,刘才龙,高春晓,韩永昊
来源: Chinese Physics Letters 2019年07期
年度: 2019
分类: 基础科学,工程科技Ⅰ辑
专业: 无机化工
单位: State Key Laboratory of Superhard Materials, College of Physics, Jilin University
基金: Supported by the National Natural Science Foundation of China under Grant Nos 11774126,11774174 and 11404133
分类号: TQ135.32
页码: 95-98
总页数: 4
文件大小: 628K
下载量: 31
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