The first room-temperature ambient-pressure superconductor?

Post by bananapub » Tue, Jul 25, 2023, 10:53 PM UTC

JumpCrisscross wrote: post #314

Tuna-Fish wrote: post #176

Earlier quoted context omitted.

When you cool some materials down until they are very cold, something weird happens: Their electrical resistance vanishes, and they start rejecting all magnetic fields. It's important to note that this is not a continuous process where things slowly change until it reaches zero, it is a step change after which everything related to electricity works very differently. This doesn't mean there is no resistance in the wi…

> Their electrical resistance vanishes To put this in further context, RTP superconductors mean compact, low-power MRIs and a massive shrinking, simplification and superpowering of magnetic-confinement fusion and ion propulsion designs. It blows apart chip designers' thermal constraints and opens up entire classes of energy-storage chemistries. If this is real, it will be the defining discovery of our lifetimes.

Post by carabiner » Tue, Jul 25, 2023, 10:56 PM UTC

JumpCrisscross wrote: post #354

post-it wrote: post #345

Earlier quoted context omitted.

They could only cause problems solvable by more superconducting railguns, so they're a net zero at worst.

> could only cause problems solvable by more superconducting railguns If the projectile is ferromagnetic, or potentially even just diamagnetic, a defense system involving shaped ultra-high intensity magnetic fields becomes conceivable.

Post by javajosh » Tue, Jul 25, 2023, 11:00 PM UTC

Mizza wrote: post #464

javajosh wrote: post #447

Everyone is so excited, and it is exciting, but I guess I don't see how this will "change the world". It doesn't seem applicable for transmission lines (it's brittle and cannot conduct large amounts of current), which is what I would imagine would be the biggest world changing thing. Maybe it could make maglev trains a more common reality? But we seem to have trouble building trains of any sort. If you could use the…

I don't see why these transistors are going to be so much better than tubes. Okay, so you can make a smaller radio? People don't move their radios around all that much anyway. We don't know what we will know in the future, or else we would already know it.

Post by mahathu » Tue, Jul 25, 2023, 11:02 PM UTC

carabiner wrote: post #317

danbruc wrote: post #31

After skimming the paper, it reads like a legitimate paper even though I have zero expertise in the area. That it is in Word instead of LaTeX makes it feel a bit less legitimate to me and they could of course always have some error in there setup. The most notable thing to me was that this was done in a thin film where structural defects are supposedly responsible for strain in the material which in turn enables the…

> After skimming the paper, it reads like a legitimate paper even though I have zero expertise in the area. Ummm am I the only one who finds this line hilarious?

Post by freeone3000 » Tue, Jul 25, 2023, 11:02 PM UTC

andreiklochko wrote: post #389

Guys, even if everything in this paper is true, the material as it is might have limited applications. From what they show, the critical field and critical current seem very low. 2500 Oe is like 0.25 Tesla. Even REBCO at 77K is >1T. And 2500 Oe is not even at critical temperature but much lower. From skimming through the article I couldn't find the sample size of the current measurement to get the critical current de…