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Superconductivity and phase stability of potassium-doped biphenyl

Abstract

Phenyl molecules are proposed as potential high-temperature superconductors due to exhibiting interesting properties. Here, we report discovery of superconductivity with the critical temperature (Tc) of ~ 7.2 Kelvin in potassium (K)-doped biphenyl (C12H10). The dc magnetic susceptibility measurements provide solid evidence for the presence of Meissner effect in KxC12H10. The Raman spectra detected the bipolaronic characteristics in this superconducting state, which is proposed to account for the electrons pairing. Theoretical simulations proved the information of crystal structure of KxC12H10. Combining XRD with formation energy, we suggest that the superconducting phase corresponds to K2C12H10 or with a small charge fluctuation in a layered structure. The discovery of superconductivity in K-doped biphenyl extremely expands the applications in the superconducting field.

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Publication details

The article was received on 14 Aug 2018, accepted on 06 Sep 2018 and first published on 07 Sep 2018


Article type: Paper
DOI: 10.1039/C8CP05184D
Citation: Phys. Chem. Chem. Phys., 2018, Accepted Manuscript
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    Superconductivity and phase stability of potassium-doped biphenyl

    G. Zhong, D. Yang, K. Zhang, R. Wang, C. Zhang, H. Lin and X. Chen, Phys. Chem. Chem. Phys., 2018, Accepted Manuscript , DOI: 10.1039/C8CP05184D

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