| 高压下WSe2的电学性质及金属化相变 |
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| 引用本文： | 刘鲍,彭刚,吴宝嘉.高压下WSe2的电学性质及金属化相变[J].吉林大学学报(理学版),2011,49(5):929-931. |
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| 作者姓名： | 刘鲍 彭刚 吴宝嘉 |
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| 作者单位： | 1. 东北电力大学 理学院, 吉林 吉林 132012,2. 吉林大学 超硬材料国家重点实验室, 长春 130012,3. 延边大学 理学院, 吉林 ,延吉 133002 |
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| 基金项目： | 国家自然科学基金(批准号:50772041;50772043;10874053;11074094;50802033); 国家重点基础研究发展计划973项目基金(批准号:2011CB808204); 吉林省“十一五”科学技术研究计划项目(批准号:200927) |
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| 摘 要： | 利用高压原位电阻率测量技术, 观察0~48.2 GPa内WSe2电阻率随压强的变化规律, 并测量了WSe2电阻率在不同压强下随温度的变化关系. 结果表明: WSe2电阻率在压力作用下的变化规律与杂质能级压致离化后的传导有关; 由于压致能隙闭合, WSe2在38.1 GPa时发生等结构的半导体性到金属性的相转变.
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| 关 键 词： | 硒化钨 高压 电阻率 金属化 |
| 收稿时间： | 2011-08-04 |
Electrical Properties and Metallization of WSe_2 under High Pressure |
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| LIU Bao,PENG Gang,WU Bao-jia.Electrical Properties and Metallization of WSe_2 under High Pressure[J].Journal of Jilin University: Sci Ed,2011,49(5):929-931. |
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| Authors: | LIU Bao PENG Gang WU Bao-jia |
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| Institution: | 1. College of Science, Northeast Dianli University, Jilin 132012, Jilin Province, China|2. State Key Laboratory |of Super Hard Materials, Jilin University, Changchun 130012, China|3. College of Science, Yanbian University, Yanji 133002, Jilin Province, China |
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| Abstract: | The pressure dependence of electrical resistivity of WSe2 was observed by means of in situ high pressure electrical resistivity measurement in a range of 0-48.2 GPa . The temperature dependence of the electrical resistivity of WSe2 was measured under different pressures. The results show that the pressure response of the electrical resistivity of WSe2 was associated with the conduction of pressure-|induced ionization of impurity levels; owing to the pressure induced band gap closure, WSe2 sample underwent an isostructural semiconductor\|metal phase transition at 38.1 GPa. |
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| Keywords: | WSe2 high pressure electrical resistivity metallization |
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