Possible Superconductivity at 37 K in Graphite-Sulfur Composite

Details Possible Superconductivity at 37 K in Graphite-Sulfur Composite Possible Superconductivity at 37 K in Graphite-Sulfur Composite

2001-11-23

arxiv.org/abs/cond-mat/0111445v1

Physics

Condensed Matter

Superconductivity

CHIN. PHYS.LETT v18 1648 (2001)

Scientific paper

10.1088/0256-307X/18/12/332

Sulfur intercalated graphite composites with diamagnetic transitions at 6.7 K and 37 K are prepared. The magnetization hysteresis loops (MHL), Xray diffraction patterns, and resistance were measured. From the MHL, a slight superconducting like penetration process is observed at 15 K in low field region. The XRD shows no big difference from the mixture of graphite and sulfur indicating that the volume of the superconducting phase (if any) is very small. The temperature dependence of resistance shows a typical semiconducting behavior with a saturation in low temperature region. This saturation is either induced by the de-localization of conducting electrons or by possible superconductivity in this system.

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