Advanced Materials

Can Doping Graphite Trigger Room Temperature Superconductivity? Evidence for Granular High-Temperature Superconductivity in Water-Treated Graphite Powder

Authors

  • T. Scheike,

    1. Division of Superconductivity and Magnetism, Institut für Experimentelle Physik II, Fakultät für Physik und Geowissenschaften der, Universität Leipzig, Linnéstrasse 5, D-04103 Leipzig, Germany
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  • W. Böhlmann,

    1. Division of Superconductivity and Magnetism, Institut für Experimentelle Physik II, Fakultät für Physik und Geowissenschaften der, Universität Leipzig, Linnéstrasse 5, D-04103 Leipzig, Germany
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  • P. Esquinazi,

    Corresponding author
    1. Division of Superconductivity and Magnetism, Institut für Experimentelle Physik II, Fakultät für Physik und Geowissenschaften der, Universität Leipzig, Linnéstrasse 5, D-04103 Leipzig, Germany
    • Division of Superconductivity and Magnetism, Institut für Experimentelle Physik II, Fakultät für Physik und Geowissenschaften der, Universität Leipzig, Linnéstrasse 5, D-04103 Leipzig, Germany.
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  • J. Barzola-Quiquia,

    1. Division of Superconductivity and Magnetism, Institut für Experimentelle Physik II, Fakultät für Physik und Geowissenschaften der, Universität Leipzig, Linnéstrasse 5, D-04103 Leipzig, Germany
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  • A. Ballestar,

    1. Division of Superconductivity and Magnetism, Institut für Experimentelle Physik II, Fakultät für Physik und Geowissenschaften der, Universität Leipzig, Linnéstrasse 5, D-04103 Leipzig, Germany
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  • A. Setzer

    1. Division of Superconductivity and Magnetism, Institut für Experimentelle Physik II, Fakultät für Physik und Geowissenschaften der, Universität Leipzig, Linnéstrasse 5, D-04103 Leipzig, Germany
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Abstract

Granular superconductivity in powders of small graphite grains (several tens of micrometers) is demonstrated after treatment with pure water. The temperature, magnetic field and time dependence of the magnetic moment of the treated graphite powder provides evidence for the existence of superconducting vortices with some similarities to high-temperature granular superconducting oxides but even at temperatures above 300 K. Room temperature superconductivity in doped graphite or at its interfaces appears to be possible.

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