Posted On: 11/09/2016 9:09:12 AM
Post# of 22465
Anti-Superconductivity in Nano-Diamond Powder
B. de Mayo
(Submitted on 30 Oct 2016)
The electrical resistance of nano-diamond powders was measured from 130 K to 370 K. As the temperature was reduced from room temperature (around 295 K), at a particular temperature (around 245 K) the resistance increased to the limit of our device (10exp38 Ohm), where it remained down to 130 K. Upon warming, the resistance suddenly regained its previous value of 119 MOhm at around the same temperature (around 249 K). Continued warming followed the cooling behavior up to 370 K. When the conductance was plotted instead of the resistance, a behavior reminiscent of superconductivity was noted: the conductance steadily dropped with cooling until a critical temperature Tc was reached, whereupon the conductance dropped suddenly (in less that 0.5 sec) and completely to zero (less than 10exp-38 S). Upon warming, the conductance reappeared at around the same Tc: anti-superconductivity. Subsequent measurements revealed that exposure to a relative humidity of at least 55% was necessary for the observance of the transitions.
https://arxiv.org/abs/1611.02242
B. de Mayo
(Submitted on 30 Oct 2016)
The electrical resistance of nano-diamond powders was measured from 130 K to 370 K. As the temperature was reduced from room temperature (around 295 K), at a particular temperature (around 245 K) the resistance increased to the limit of our device (10exp38 Ohm), where it remained down to 130 K. Upon warming, the resistance suddenly regained its previous value of 119 MOhm at around the same temperature (around 249 K). Continued warming followed the cooling behavior up to 370 K. When the conductance was plotted instead of the resistance, a behavior reminiscent of superconductivity was noted: the conductance steadily dropped with cooling until a critical temperature Tc was reached, whereupon the conductance dropped suddenly (in less that 0.5 sec) and completely to zero (less than 10exp-38 S). Upon warming, the conductance reappeared at around the same Tc: anti-superconductivity. Subsequent measurements revealed that exposure to a relative humidity of at least 55% was necessary for the observance of the transitions.
https://arxiv.org/abs/1611.02242
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