中国物理B ›› 2016, Vol. 25 ›› Issue (6): 66802-066802.doi: 10.1088/1674-1056/25/6/066802

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Effects of grinding-induced grain boundary and interfaces on electrical transportation and structure phase transition in ZnSe under high pressure

Jie Yang(杨洁), Pei Wang(汪沛), Guo-Zhao Zhang(张国召), Xiao-Xue Zhou(周晓雪), Jing Li(李静), Cai-Long Liu(刘才龙)   

  1. 1 Fundamental Department, Aviation University of Airforce, Changchun 130022, China;
    2 State Key Laboratory of Superhard Materials, Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
    3 School of Mechatronic Engineering, Changchun University of Technology, Changchun 130012, China
  • 收稿日期:2016-01-17 修回日期:2016-02-24 出版日期:2016-06-05 发布日期:2016-06-05
  • 通讯作者: Jing Li, Cai-Long Liu E-mail:lj5286@126.com;cailong_liu@jlu.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11404133 and 11374121) and the Program of Science and Technology Development Plan of Jilin Province, China (Grant No. 20140520105JH).

Effects of grinding-induced grain boundary and interfaces on electrical transportation and structure phase transition in ZnSe under high pressure

Jie Yang(杨洁)1,2, Pei Wang(汪沛)1,2, Guo-Zhao Zhang(张国召)2, Xiao-Xue Zhou(周晓雪)2, Jing Li(李静)3, Cai-Long Liu(刘才龙)2   

  1. 1 Fundamental Department, Aviation University of Airforce, Changchun 130022, China;
    2 State Key Laboratory of Superhard Materials, Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
    3 School of Mechatronic Engineering, Changchun University of Technology, Changchun 130012, China
  • Received:2016-01-17 Revised:2016-02-24 Online:2016-06-05 Published:2016-06-05
  • Contact: Jing Li, Cai-Long Liu E-mail:lj5286@126.com;cailong_liu@jlu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11404133 and 11374121) and the Program of Science and Technology Development Plan of Jilin Province, China (Grant No. 20140520105JH).

摘要:

Interface and scale effects are the two most important factors which strongly affect the structure and the properties of nano-/micro-crystals under pressure. We conduct an experiment under high pressure in situ alternating current impedance to elucidate the effects of interface on the structure and electrical transport behavior of two ZnSe samples with different sizes obtained by physical grinding. The results show that (i) two different-sized ZnSe samples undergo the same phase transitions from zinc blend to cinnabar-type phase and then to rock salt phase; (ii) the structural transition pressure of the 859-nm ZnSe sample is higher than that of the sample of 478 nm, which indicates the strong scale effect. The pressure induced boundary resistance change is obtained by fitting the impedance spectrum, which shows that the boundary conduction dominates the electrical transport behavior of ZnSe in the whole experimental pressure range. By comparing the impedance spectra of two different-sized ZnSe samples at high pressure, we find that the resistance of the 478-nm ZnSe sample is lower than that of the 859-nm sample, which illustrates that the sample with smaller particle size has more defects which are due to physical grinding.

关键词: interface effect, impedance, phase transition, high pressure

Abstract:

Interface and scale effects are the two most important factors which strongly affect the structure and the properties of nano-/micro-crystals under pressure. We conduct an experiment under high pressure in situ alternating current impedance to elucidate the effects of interface on the structure and electrical transport behavior of two ZnSe samples with different sizes obtained by physical grinding. The results show that (i) two different-sized ZnSe samples undergo the same phase transitions from zinc blend to cinnabar-type phase and then to rock salt phase; (ii) the structural transition pressure of the 859-nm ZnSe sample is higher than that of the sample of 478 nm, which indicates the strong scale effect. The pressure induced boundary resistance change is obtained by fitting the impedance spectrum, which shows that the boundary conduction dominates the electrical transport behavior of ZnSe in the whole experimental pressure range. By comparing the impedance spectra of two different-sized ZnSe samples at high pressure, we find that the resistance of the 478-nm ZnSe sample is lower than that of the 859-nm sample, which illustrates that the sample with smaller particle size has more defects which are due to physical grinding.

Key words: interface effect, impedance, phase transition, high pressure

中图分类号:  (Semiconductors)

  • 68.35.bg
73.25.+i (Surface conductivity and carrier phenomena)