2008/08/13 by Zhanqiang Liu, A. F. Fang, Liu, Zhanqiang +5
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Iron-based superconductors research #Rare-earth and actinide compounds #Superconductivity (cond-mat.supr-con) #Superconductivity in MgB2 and Alloys
paper · pdf · doi:10.48550/arxiv.0808.1784
openalex publication_date 2008/08/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Superconductivity with zero resistance transition temperature (Tc) up to 8.4 K and 8.3 K can be obtained by doping cobalt and sodium in alfa-FeSe with the nominal composition of Fe0.92Co0.08Se and Na0.1FeSe, respectively. The electrical resistivity and AC magnetic susceptibility of the prepared samples, measured with physical property measurement system (PPMS), unambiguously consistent with each other to indicate that the samples are superconductive. The respective doping mechanisms for cobalt and sodium into the parent alfa-FeSe are the Fe-site substitution and the interlayer insertion. It is the first time that alfa-FeSe can be induced to be a superconductor with Na+ intercalated into the interlayers.