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Superconductivity at 3.5 K and/or 7.2 K in Potassium-Doped Triphenylbismuth

Superconductivity at 3.5 K and/or 7.2 K in Potassium-Doped Triphenylbismuth

Ren-Shu Wang, Jia Cheng, Xiao-Lin Wu, Hui Yang, Xiao-Jia Chen, Yun Gao, Zhong-Bing Huang

J Chem Phys. 2018 Oct 14;149(14):144502.

PMID: 30316270

Abstract:

We develop a two-step synthesis method-ultrasound treatment and low temperature annealing to 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 piece of evidence of type-II superconductors. It is found that the doped materials crystallize into the triclinic P1 structure, with a mole ratio of 4:1 between potassium and triphenylbismuth. Both the calculated electronic structure and measured Raman spectra indicate that superconductivity is realized by transferring electrons from the K-4s to C-2p orbital. Our study opens an encouraging window for the search of organic superconductors in organometallic molecules.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP603338	Triphenylbismuth		603-33-8	Price

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