Inducement of superconductivity in Fe(Te,S) by sulfuric acid treatment
Masanori Nagao, Yoshikazu Mizuguchi, Keita Deguchi, Satoshi Watauchi,, Isao Tanaka, Yoshihiko Takano
TL;DR
This study demonstrates that immersing Fe(Te,S) in sulfuric acid induces and enhances superconductivity by removing excess iron, as confirmed by chemical analysis.
Contribution
It introduces a simple chemical treatment method to induce and improve superconductivity in Fe(Te,S) compounds.
Findings
Superconductivity was successfully induced in non-superconducting samples.
Excess Fe was removed during sulfuric acid treatment.
Superconducting properties were enhanced after treatment.
Abstract
Superconductivity of Fe0.95Te0.85S0.15 was induced and enhanced by immersing the as-grown (non-superconducting) sample into sulfuric acid. Dissolved Fe was detected in the sulfuric acid treatment, indicating that excess Fe was removed from the Fe0.95Te0.85S0.15 sample.
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