Anomalous Eu Valence State and Superconductivity in Undoped Eu3Bi2S4F4

Hui-Fei Zhai, Pan Zhang, Si-Qi Wu +13

We have synthesized a novel europium bismuth sulfofluoride, Eu3Bi2S4F4, by solid-state reactions in sealed evacuated quartz ampoules. The compound crystallizes in a tetragonal latt…