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

Authors :: Satoshi Demura
Takahide Yamaguchi
Takuma Yamaki
Aichi Yamashita
Hiroyuki Okazaki
Saleem J. Denholme
Hiroshi Hara
Yunchao Zhang
Masashi Tanaka
Yoshihiko Takano
Masaya Fujioka
Keita Deguchi
Kouji Suzuki
Hiroyuki Takeya
Publication Year :: 2014
Publisher :: arXiv, 2014.
Abstract: 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 1.5 V. This result suggests that an electrochemical reaction can be used as a novel method to develop new superconducting materials.<br />Comment: 12 pages, 3 figures