J4 ›› 2011, Vol. 49 ›› Issue (05): 929-931.

• 物理 • 上一篇    下一篇

高压下WSe2的电学性质及金属化相变

刘鲍1,2, 彭刚2, 吴宝嘉3   

  1. 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
  • 收稿日期:2011-08-04 出版日期:2011-09-26 发布日期:2011-09-27
  • 通讯作者: 刘鲍 E-mail:liubao08@mails.jlu.edu.cn

Electrical Properties and Metallization of WSe2 under High Pressure

LIU Bao1,2, PENG Gang2, WU Bao jia3   

  1. 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
  • Received:2011-08-04 Online:2011-09-26 Published:2011-09-27
  • Contact: LIU Bao E-mail:liubao08@mails.jlu.edu.cn

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.

关键词: 硒化钨, 高压, 电阻率, 金属化

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, WSe2 sample underwent an isostructural semiconductor\|metal phase transition at 38.1 GPa.

Key words: WSe2, high pressure, electrical resistivity, metallization

中图分类号: 

  • O521