Electrochemical synthesis of alkali-intercalated iron selenide superconductors

doi:10.1088/1674-1056/24/11/117406

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 K_xFe₂Se₂ and Na_xFe₂Se₂ 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.

Keywords: superconductivity iron-based superconductor electrochemical synthesis intercalation

Received: 25 June 2015
Revised: 10 October 2015
Accepted manuscript online:

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

Fund:

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.

Corresponding Authors: Wang Gang
E-mail: gangwang@iphy.ac.cn

Cite this article:

Shen Shi-Jie (申士杰), Ying Tian-Ping (应天平), Wang Gang (王刚), Jin Shi-Feng (金士锋), Zhang Han (张韩), Lin Zhi-Ping (林志萍), Chen Xiao-Long (陈小龙) Electrochemical synthesis of alkali-intercalated iron selenide superconductors 2015 Chin. Phys. B 24 117406

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Electrochemical synthesis of alkali-intercalated iron selenide superconductors

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