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Can doping graphite trigger room temperature superconductivity? Evidence for granular high-temperature superconductivity in water-treated graphite powder
Preprint
2012-09-10
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Abstract
Trying to dope graphite flakes we found that the magnetization of pure, several tens
of micrometers grain size graphite powder and after a simple treatment with pure water
shows clear and reproducible granular superconducting behavior with a critical temperature
above 300K. The observed magnetic characteristics as a function of temperature, magnetic
field and time, provide evidence for weakly coupled grains through Josephson interaction,
revealing the existence of superconducting vortices.