Room-Temperature Superconductivity

  • could conduct electricity perfectly at temperatures as warm as 110 degrees Fahrenheit.


    https://arxiv.org/pdf/1807.08572.pdf


    Sorry, you need to look more carefully at the article cited. While very remarkable and potentially very useful, the reported superconductivity is still "instrument limited" to a value, near or less than, 10 ^ minus 4 ohm. That is not yet necessarily "perfect" electrical conductivity. The definitive demonstration of the Meissner effect is yet to be reported by Thapa and Pandey .


    But even if it were, the transition temperature range reported lies between 236 K and 243 K, this equates to a range of about minus 37 to minus 30 degrees C, which is about minus 34.6 degrees F to minus 22 degrees F. Needless to emphasize, a long thermal distance from plus 110 degrees F (which equals plus 43.33 degrees C).

  • I see that toward the end of the article by Thapa and Pandey:


    Quote


    showing superconductive gold / silver "colloid", there IS indeed claimed evidence of the Meissner effect:


    "Further, we observed that pellets of suchsamples are significantly diamagnetic (Chi sub nu = minus 0.037) under ambient conditions

    (Figure 4d), consistent with the existence of a superconducting state at room temperatures"


    [However, "Figure 4d", is unfortuantely not apparent in this transcript]

  • Another particularly important feature of the reported near room temperature conductivity in this article by Thapa and Pandey, is that the "fall back" relatively high conventional conductivity of this material. Many, if not most, superconductors become substantially electrically resistant in a failure of say refrigeration or if they happen to exceed an ambient or self-induced threshold magnetic field strength.