中国物理B ›› 2015, Vol. 24 ›› Issue (11): 117406-117406.doi: 10.1088/1674-1056/24/11/117406

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Electrochemical synthesis of alkali-intercalated iron selenide superconductors

申士杰a, 应天平a, 王刚a, 金士锋a, 张韩a, 林志萍a, 陈小龙a b   

  1. a Research & Development Center for Functional Crystals, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    b Collaborative Innovation Center of Quantum Matter, Beijing, China
  • 收稿日期:2015-06-25 修回日期:2015-10-10 出版日期:2015-11-05 发布日期:2015-11-05
  • 通讯作者: Wang Gang E-mail:gangwang@iphy.ac.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 51322211and 91422303), the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant No. XDB07020100), Beijing Nova Program of China (Grant No. 2011096), and K. C. Wong Education Foundation, Hong Kong, China.

Electrochemical synthesis of alkali-intercalated iron selenide superconductors

Shen Shi-Jie (申士杰)a, Ying Tian-Ping (应天平)a, Wang Gang (王刚)a, Jin Shi-Feng (金士锋)a, Zhang Han (张韩)a, Lin Zhi-Ping (林志萍)a, Chen Xiao-Long (陈小龙)a b   

  1. a Research & Development Center for Functional Crystals, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    b Collaborative Innovation Center of Quantum Matter, Beijing, China
  • Received:2015-06-25 Revised:2015-10-10 Online:2015-11-05 Published:2015-11-05
  • Contact: Wang Gang E-mail:gangwang@iphy.ac.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 51322211and 91422303), the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (Grant No. XDB07020100), Beijing Nova Program of China (Grant No. 2011096), and K. C. Wong Education Foundation, Hong Kong, China.

摘要:

Electrochemical method has been used to insert K/Na into FeSe lattice to prepare alkali-intercalated iron selenides at room temperature. Magnetization measurement reveals that KxFe2Se2 and NaxFe2Se2 are superconductive at 31 K and 46 K, respectively. This is the first successful report of obtaining metal-intercalated FeSe-based high-temperature superconductors using electrochemical method. It provides an effective route to synthesize metal-intercalated layered compounds for new superconductor exploration.

关键词: superconductivity, iron-based superconductor, electrochemical synthesis, intercalation

Abstract:

Electrochemical method has been used to insert K/Na into FeSe lattice to prepare alkali-intercalated iron selenides at room temperature. Magnetization measurement reveals that KxFe2Se2 and NaxFe2Se2 are superconductive at 31 K and 46 K, respectively. This is the first successful report of obtaining metal-intercalated FeSe-based high-temperature superconductors using electrochemical method. It provides an effective route to synthesize metal-intercalated layered compounds for new superconductor exploration.

Key words: superconductivity, iron-based superconductor, electrochemical synthesis, intercalation

中图分类号:  (Pnictides and chalcogenides)

  • 74.70.Xa
82.45.Aa (Electrochemical synthesis) 74.25.-q (Properties of superconductors) 74.62.Bf (Effects of material synthesis, crystal structure, and chemical composition)