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The first room-temperature ambient-pressure superconductor?

arxiv.org

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Re: The first room-temperature ambient-pressure superconductor?

#551

Post by jacquesm »

javajosh wrote: post #524
telltruth wrote: post #71

Could someone explain why is this world changing?

Other commenters have science fiction dust in their eyes, and speak of room temp superconductors in general. But this particular discovery is a brittle crystalline structure that cannot be extruded into wires, and does not have the high current capacity required for power transmission or rail-guns. It's an important, exciting step but it's very far from world-changing at this stage. Or if it is in a limited way. The…

> We're in the "clunky transistor" period.

Exactly. But that clunky transistor was in fact world-changing. It just took a while for the changes to take place but the stage was set when that first device showed that it could be done at all.

Re: The first room-temperature ambient-pressure superconductor?

#552

Post by PBnFlash »

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…

Even application in antenna would be revolutionary

Re: The first room-temperature ambient-pressure superconductor?

#553

Post by DarmokJalad1701 »

hatsunearu wrote: post #455

I don't have any proof of this other than "vibes", but I read through the Korean website for their research lab and I'm getting major scam vibes: https://qcentre.co.kr/ Hard to put it into words, but there's something that just doesn't feel right--I'd be very skeptical of these results.

The website does not inspire confidence.

I guess we wait for other attempts at reproducing this.

Re: The first room-temperature ambient-pressure superconductor?

#554

Post by jacquesm »

amerine wrote: post #11
Akronymus wrote: post #2

I severly doubt that it is an actual room temperature superconductor, but would love to hear the opinions of more well informed people on that topic.

Wasn't there some recent excitement about some hydrogen sulfide superconductor thing? But the pressure required was wild/not-useful-for-use or something like that?

Yes, H2S is superconducting at higher temperatures than anything else up to that point (but still well below zero), but it required very high pressure making it impractical for a lot of applications.

Re: The first room-temperature ambient-pressure superconductor?

#555

Post by pezezin »

nick__m wrote: post #506
mcv wrote: post #459

Earlier quoted context omitted.

CPUs that don't generate heat? That would be pretty awesome.

Superconductivity is not enough for a cpu that doesn't generate heat, you would need a cpu built of reversible logic gate. Thermodynamics requires that when you destroy a bit of information you generate at least 2.9×10−21 J. It's the Landauer's principle.

My understanding is that modern CMOS circuits dissipate around 1 pJ (10^-12) per bit, so even if we are limited by the Landauer's principle, it would still be a 9 orders of magnitude improvement. I would surely love a CPU that uses microwatts instead of hundreds of watts.

Re: The first room-temperature ambient-pressure superconductor?

#556

Post by overboard2 »

downvotetruth wrote: post #550
lopuhin wrote: post #428

Earlier quoted context omitted.

I think it's even from 2021-08-25, see https://patents.google.com/patent/KR20230030188A/en?oq=WO202...

2 years after the patent application and 4 months since publication and not involving any lab an author is not apart of to replicate a process that should take a week - a reason to wait for seems hard to justify.

These look like very general patents

Re: The first room-temperature ambient-pressure superconductor?

#558

Post by georgewh »

hguant wrote: post #544
hollerith wrote: post #508

Earlier quoted context omitted.

Tangentially, the US Army has completely stopped using lead in bullets. Their 5.56 NATO ammo has copper where the lead used to be (i.e., inside a brass jacket) which reduces performance because copper is only 2/3 as dense as lead.

Sorry, but this is entirely incorrect. First, terms - brass is not used to "jacket" a bullet. Brass is used as the case material for the cartridge. Steel, and nickel plated steel are some times also used here. "Jacketing" (as in, Full Metal Jacket) refers to the material that wraps around the exterior of the projectile. As far as I'm aware, the material used here is almost always copper, or a copper alloy (cupronicke…

M855A1 is copper core. Lead free was a requirement as lead contamination from ranges was becoming a problem. See: https://www.army.mil/article-amp/106710/picatinny_ammo_goes_...

Re: The first room-temperature ambient-pressure superconductor?

#560

Post by NamTaf »

BariumBlue wrote: post #330
LastMuel wrote: post #70

Earlier quoted context omitted.

Is this the prior post you’re referencing? https://news.ycombinator.com/item?id=36479776

Yes! That was exactly what I was thinking of! I love one of the comments - "But might this physical stretching then also allow room temperature superconductors, if not why not?" They were thinking of stretching at a macro scale (like bending a bar of stuff), rather than essentially "stretching" at the chemical scale which is what I understand they did here. Super cool!

It gets even better. fwlr, in a comment further down that thread, expands:

> I think the “tension axis” is more likely to be fruitful in a different way, where we find some structure e.g. a crystalline formation that happens to hold atoms apart with just the right amount of tension. But this is all very speculative - the “tension axis” is just a random thought I had while reading the article!

They hit the nail on the head pretty well, I’d say!

[1]: https://news.ycombinator.com/item?id=36487946

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