中国物理B ›› 2020, Vol. 29 ›› Issue (12): 127404-.doi: 10.1088/1674-1056/abc3af

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  • 收稿日期:2020-08-04 修回日期:2020-09-22 接受日期:2020-10-22 出版日期:2020-12-01 发布日期:2020-11-26

Structural and electrical transport properties of Cu-doped Fe1 -xCuxSe single crystals

He Li(李贺)1,2, Ming-Wei Ma(马明伟)2,3,†, Shao-Bo Liu(刘少博)2,4, Fang Zhou(周放)2,3,4, and Xiao-Li Dong(董晓莉)2,3,4   

  1. 1 International Laboratory for Quantum Functional Materials of Henan, and School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China; 2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; 3 Songshan Lake Materials Laboratory, Dongguan 523808, China; 4 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2020-08-04 Revised:2020-09-22 Accepted:2020-10-22 Online:2020-12-01 Published:2020-11-26
  • Contact: Corresponding author. E-mail: mw_ma@iphy.ac.cn
  • Supported by:
    Project supported by the National Key Research and Development of China (Grant No. 2018YFA0704200), the National Natural Science Foundation of China (Grant No. 11834016), and the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB25000000).

Abstract: We report the structural and electrical transport properties of Fe1 -xCuxSe (x = 0, 0.02, 0.05, 0.10) single crystals grown by a chemical vapor transport method. Substituting Cu for Fe suppresses both the nematicity and superconductivity of FeSe single crystal, and provokes a metal-insulator transition. Our Hall measurements show that the Cu substitution also changes an electron dominance at low temperature of un-doped FeSe to a hole dominance of Cu-doped Fe1 -xCuxSe at x = 0.02 and 0.1, and reduces the sign-change temperature (TR) of the Hall coefficient (R H).

Key words: iron-based superconductivity, crystal growth, element substitution, Hall coefficient

中图分类号:  (Transport properties)

  • 74.25.F-
74.62.Dh (Effects of crystal defects, doping and substitution) 81.10.Bk (Growth from vapor) 74.70.-b (Superconducting materials other than cuprates)