2018/02/09 by Ren‐Shu Wang, Jia Cheng, Wang, Ren-Shu +11
Chemistry · Materials Science · #FOS: Physical sciences #Inorganic Chemistry and Materials #Organic and Molecular Conductors Research #Superconductivity (cond-mat.supr-con) #Synthesis and characterization of novel inorganic/organometallic compounds
paper · pdf · doi:10.48550/arxiv.1802.03320
openalex publication_date 2018/02/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Using a new two-step synthesis method - ultrasound treatment and low temperature annealing, we explore superconductivity in potassium-doped triphenylbismuth, which is composed of one bismuth atom and three phenyl rings. The combination of dc and ac magnetic measurements reveals that one hundred percent of synthesized samples exhibit superconductivity at 3.5 K and/or 7.2 K at ambient pressure. The magnetization hysteresis loops provide a strong evidence of type-II superconductor, with the upper critical magnetic field up to 1.0 Tesla. Both calculated electronic structure and measured Raman spectra indicate that superconductivity is realized by transferring electron from potassium to carbon atom. Our study opens an encouraging window for the search of organic superconductors in organometallic molecules.