中国物理B ›› 2015, Vol. 24 ›› Issue (11): 116401-116401.doi: 10.1088/1674-1056/24/11/116401

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

Carrier behavior of HgTe under high pressure revealed by Hall effect measurement

胡廷静a b, 崔晓岩a, 李雪飞a, 王婧姝a, 吕秀梅a, 王棱升a, 杨景海a, 高春晓b   

  1. a Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Siping 136000, China;
    b State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • 收稿日期:2015-05-17 修回日期:2015-07-08 出版日期:2015-11-05 发布日期:2015-11-05
  • 通讯作者: Cui Xiao-Yan, Gao Chun-Xiao E-mail:xycuimail@163.com;cxgao599@aliyun.com
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2011CB808204), the National Natural Science Foundation of China (Grant Nos. 11374121, 51441006, and 51479220), the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 11404137), the Program for the Development of Science and Technology of Jilin province, China (Grant Nos. 201201079 and 201215222), the Twentieth Five-Year Program for Science and Technology of Education Department of Jilin Province, China (Grant No. 0520306), and the Open Project Program of State Key Laboratory of Superhard Materials of China (Grant No. 201208).

Carrier behavior of HgTe under high pressure revealed by Hall effect measurement

Hu Ting-Jing (胡廷静)a b, Cui Xiao-Yan (崔晓岩)a, Li Xue-Fei (李雪飞)a, Wang Jing-Shu (王婧姝)a, Lü Xiu-Mei (吕秀梅)a, Wang Ling-Sheng (王棱升)a, Yang Jing-Hai (杨景海)a, Gao Chun-Xiao (高春晓)b   

  1. a Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Siping 136000, China;
    b State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China
  • Received:2015-05-17 Revised:2015-07-08 Online:2015-11-05 Published:2015-11-05
  • Contact: Cui Xiao-Yan, Gao Chun-Xiao E-mail:xycuimail@163.com;cxgao599@aliyun.com
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2011CB808204), the National Natural Science Foundation of China (Grant Nos. 11374121, 51441006, and 51479220), the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 11404137), the Program for the Development of Science and Technology of Jilin province, China (Grant Nos. 201201079 and 201215222), the Twentieth Five-Year Program for Science and Technology of Education Department of Jilin Province, China (Grant No. 0520306), and the Open Project Program of State Key Laboratory of Superhard Materials of China (Grant No. 201208).

摘要: We investigate the carrier behavior of HgTe under high pressures up to 23 GPa using in situ Hall effect measurements. As the phase transitions from zinc blende to cinnabar, then to rock salt, and finally to Cmcm occur, all the parameters change discontinuously. The conductivity variation under compression is described by the carrier parameters. For the zinc blende phase, both the decrease of carrier concentration and the increase of mobility indicate the overlapped valence band and conduction band separates with pressure. Pressure causes an increase in the hole concentration of HgTe in the cinnabar phase, which leads to the carrier-type inversion and the lowest mobility at 5.6 GPa. In the phase transition process from zinc blende to rock salt, Te atoms are the major ones in atomic movements in the pressure regions of 1.0-1.5 GPa and 1.8-3.1 GPa, whereas Hg atoms are the major ones in the pressure regions of 1.5-1.8 GPa and 3.1-7.7 GPa. The polar optical scattering of the rock salt phase decreases with pressure.

关键词: electrical properties, phase transitions, transport properties, scattering mechanism

Abstract: We investigate the carrier behavior of HgTe under high pressures up to 23 GPa using in situ Hall effect measurements. As the phase transitions from zinc blende to cinnabar, then to rock salt, and finally to Cmcm occur, all the parameters change discontinuously. The conductivity variation under compression is described by the carrier parameters. For the zinc blende phase, both the decrease of carrier concentration and the increase of mobility indicate the overlapped valence band and conduction band separates with pressure. Pressure causes an increase in the hole concentration of HgTe in the cinnabar phase, which leads to the carrier-type inversion and the lowest mobility at 5.6 GPa. In the phase transition process from zinc blende to rock salt, Te atoms are the major ones in atomic movements in the pressure regions of 1.0-1.5 GPa and 1.8-3.1 GPa, whereas Hg atoms are the major ones in the pressure regions of 1.5-1.8 GPa and 3.1-7.7 GPa. The polar optical scattering of the rock salt phase decreases with pressure.

Key words: electrical properties, phase transitions, transport properties, scattering mechanism

中图分类号:  (General studies of phase transitions)

  • 64.60.-i
72.20.-i (Conductivity phenomena in semiconductors and insulators) 07.35.+k (High-pressure apparatus; shock tubes; diamond anvil cells)