Not quite room temperature superconductivity yet but getting closer...

[notfaded1]

https://singularityhub.com/2020/10/19/scientists-just-achieved-room-temperature-superconductivity-for-the-first-time/

Could we be saying goodbye to resistance at room temperature in the near future?  I like this line:  The researchers are also still unclear about the exact nature of the material they have made.

Bill

[Grandchuck]

Thanks Bill.  Maybe basement JJA voltage references are coming

[Kleinstein]

For the near room temperature superconductivity they need an extreme pressure. It is much easier to get a low temperature (e.g -200° C range and likely also the 4 K range) than getting that enormous pressure.
With the high pressure they are also limited to tiny size. It may help a little with research, but I see no real break through.
I don't see any direct consequence to practical application.

Already the so called high temperature superconductors that work at some 50-100 K behave a little different from the low temperature ones. So far no Josephson junction array working at 77 K, though there are a few squids to work at 77 K and they may be useful in a not so exotic superconducting current comparator. 77K still sounds pretty cold, but it's a whole lot easier than 4 K. A quantum reference working well at 77 K would be a more relevant break through.

[notfaded1]

You're right... they say 15 degrees celsius but the team was only able to create a tiny amount of the material, roughly the same volume as a single droplet from an inkjet printer. And to get it to superconduct they had to squeeze it between two diamonds to create pressures equivalent to three-quarters of those found at the center of the Earth.  Amazing they aren't even sure what the material they created is.  Still it's interesting to think that a real breakthrough could be made and we might live to see some really new practical applications.  Really it's research like this (well research at least) that brought us the JJArray.  Yeah an array that could run at warmer temps would be big and make things cheaper to operate I would think too.

Bill