Superconductivity in FeTe0.8S0.2 induced by battery-like reaction

• Published in: Solid state communications Vol. 200; pp. 29 - 31
• Main Authors: Yamashita, Aichi, Demura, Satoshi, Tanaka, Masashi, Deguchi, Keita, Yamaki, Takuma, Hara, Hiroshi, Suzuki, Kouji, Zhang, Yunchao, Denholme, Saleem James, Okazaki, Hiroyuki, Fujioka, Masaya, Yamaguchi, Takahide, Takeya, Hiroyuki, Takano, Yoshihiko
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-12-2014; Elsevier
• Subjects: A. Iron-based superconductor; A. Superconductor; Condensed matter: electronic structure, electrical, magnetic, and optical properties; E. Battery-like reaction; Effects of material synthesis, crystal structure, and chemical composition; Exact sciences and technology; Physics; Superconductivity; Transition temperature variations; A. Iron-based superconductor; A. Superconductor; E. Battery-like reaction; Desinsertion; Stoichiometry; Iron based superconductors; Electrochemical method; Superconductivity; Polycrystals; Intercalation compounds; XRD; Citric acid; Magnetic susceptibility; Reaction mechanism; Iron Sulfides tellurides; Electrochemical reaction
• ISSN: 0038-1098; 1879-2766
• DOI: 10.1016/j.ssc.2014.09.014

Superconductivity is successfully induced by utilizing a battery-like reaction found in a typical Li-ion battery. Excess Fe in FeTe0.8S0.2 is electrochemically de-intercalated by applying a voltage in a citric acid solution. The superconducting properties improve with an increase in the applied voltage up to 1.5V. This result suggests that an electrochemical reaction can be used as a novel method to develop new superconducting materials.
•Superconductivity in FeTe0.8S0.2 is induced by utilizing a battery-like reaction.•Excess Fe in FeTe0.8S0.2 is electrochemically de-intercalated by applying a voltage.•The superconducting properties improve with an increase in the applied voltage.