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Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

arxiv.org

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Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#51

Post by dgoldstein0 »

internetter wrote: post #39
slavetologic wrote: post #24

Earlier quoted context omitted.

That's what I'm not understanding about this frenzy. Seems like this already kind of exists?

The original report is billed as a "room temperature superconductor" (iirc up to 28c). If it is indeed a superconductor at room temperature, it would be the first of it's kind and enable functional usages for superconductors previously impossible.

The original claim was Tc of 127c - above the boiling point of water.

Plenty of reason to doubt it though. Of course I'm hoping it's real.

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#52

Post by [deleted] »

tomohelix wrote: post #30

Summary of events so far: The claim: Room temp (~300K) superconductor exists and we got it! The replication attempts: The production method is so poorly documented only a fraction of the samples being made shows any interesting properties. And among those interesting ones, results varies. Very few, if any, attempt actually completely shows the entire spectrum of properties and behaviors of a true superconductor at ro…

[deleted]

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#53

Post by ianai »

throwawaylinux wrote: post #44
segfaultbuserr wrote: post #23

Earlier quoted context omitted.

One of the authors commented in their previous video pre-announcement that they suspect it was a probe cleanliness problem, which they would investigate later.

Is this kind of thing typical for experiments working to confirm such significant results, or is there a mad rush to publish? Do you really get a lot of prestige from confirming somebody else's result? I would have thought the risk to reputation from sloppy work would far outweigh it (see: the cold fusion shenanigans).

Probably a lab that confirms any piece of it will get a significant share of attention and acclaim.

I heard the research group got scooped by a former researcher. Former researcher outed them before they were ready for all the relevant questions. Not a particularly good thing to do for a career to out colleagues like that.

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#54

Post by distortionfield »

mrandish wrote: post #19

For comparison, per this Wikipedia page ( https://en.wikipedia.org/wiki/High-temperature_superconducti... ) currently, the highest temperature, ambient pressure superconductor is around 138 K (−135 °C). I'm no expert but based on my limited understanding, this result (if confirmed) while far from room temperature would still make LK99 a pretty interesting discovery in the SC world. And once a new SC like this is vali…

The doping agents used in synthesis seem like interesting pathways towards finding something more stable and reproducible in their cook

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#55

Post by ramraj07 »

Waterluvian wrote: post #45

I don’t understand the physics, but it feels like a truly zero resistance conductor would violate some law of thermodynamics or something. Is a superconductor truly zero impedence or just very very very low? Because I’m seeing a lot of these graphs with something like: “0.00001ohm” as the y-axis floor.

MRI machines work using superconducting magnets as does the LHC. So you better believe it buddy.

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#56

Post by chungy »

ant6n wrote: post #22
jesprenj wrote: post #5

Is this one also written in Word so it automatically loses LaTeX-credibility, as was commented under the first paper? (:

Maybe some people wanna focus on the work and not on the geek cred. (I need to write some thesis like thing soon, like 15 years after my masters thesis that was written in latex, and do I really want to bother setting latex up again and futz with templates and fight for correctly positioned figures, or just use Word and be done with it?)

Give TeXmacs a shot.

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#57

Post by ramraj07 »

jesprenj wrote: post #5

Is this one also written in Word so it automatically loses LaTeX-credibility, as was commented under the first paper? (:

I would have said latex gatekeepers are the worst, but now I know eMacs geeks so no. Or was it vim? Can never tell!

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#58

Post by distortionfield »

Waterluvian wrote: post #45

I don’t understand the physics, but it feels like a truly zero resistance conductor would violate some law of thermodynamics or something. Is a superconductor truly zero impedence or just very very very low? Because I’m seeing a lot of these graphs with something like: “0.00001ohm” as the y-axis floor.

It doesn’t though, that’s what’s so tantalizing about it. It’s counterintuitive but as I understand it, the current best theory of superconductor behavior properly conserves mass and energy and the math says a room temperature one should be perfectly possible. It’s just not been found. And yes, it’s truly zero resistance as far as we understand the concept of “resistance”.

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#59

Post by Waterluvian »

ramraj07 wrote: post #55
Waterluvian wrote: post #45

I don’t understand the physics, but it feels like a truly zero resistance conductor would violate some law of thermodynamics or something. Is a superconductor truly zero impedence or just very very very low? Because I’m seeing a lot of these graphs with something like: “0.00001ohm” as the y-axis floor.

MRI machines work using superconducting magnets as does the LHC. So you better believe it buddy.

Why do MRIs need zero resistance vs incredibly low resistance?

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#60

Post by wbl »

brucethemoose2 wrote: post #33
tomohelix wrote: post #30

Summary of events so far: The claim: Room temp (~300K) superconductor exists and we got it! The replication attempts: The production method is so poorly documented only a fraction of the samples being made shows any interesting properties. And among those interesting ones, results varies. Very few, if any, attempt actually completely shows the entire spectrum of properties and behaviors of a true superconductor at ro…

Some literature suggests its a "one dimensiononal" superconductor only kinda works in tiny monocrystaline grains. ...But maybe thats even more interesting for, say, microelectronics? Especially if the resistance orthogonal to the superconductivity is high, if such a thing is even possible?

The really cute thing is conducting in one axis insulating in the other two. Then you get to have a very high density interconnect for free.
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