Electronic Structure of LK-99 • Hacker News Board

Re: Electronic Structure of LK-99

#311

Post by mianos » Wed, Aug 02, 2023, 11:49 AM UTC

rvnx wrote: post #280

weinzierl wrote: post #238

Earlier quoted context omitted.

This is probably a very stupid question, but why is simply measuring resistance not enough to conclusively prove that it is a superconductor. I mean, isn't zero resistance the defining property?

Just guessing: I would say not enough because the sample is extremely small and there is chance that the electrons jump from each sides of the probes, skipping the sample ? (like a short-circuit) + the fact that the probes themselves are not superconductor, so there is a natural accepted tolerance in the measures (claimed to be due to the probes)

If the video is to be believed, the samples shown are huge compared to a, trivial to make, pulled or cut platinum wire probe. You could just put it on a plate in an SPM and measure it.

So many questions. I assume this is all possible but they are focussing on one thing at a time to duplicate the results, if possible.

Re: Electronic Structure of LK-99

#312

Post by dasudasu » Wed, Aug 02, 2023, 11:58 AM UTC

irthomasthomas wrote: post #227

bluecoconut wrote: post #12

I got my PhD studying band structure of high-tc superconductors (experimentalist, ARPES). These Cu d-d interactions right at the fermi energy give me huge hope. Feels very familiar to other superconductors (re: all the cuprates). (Note: I specifically worked in a lab that was measuring a lot of the d-wave character / gap-energies of various superconductors) All in all, I'm now much more bullish on LK-99 being real su…

I think we're being trolled. Or trawled. Not sure which, yet. But the mention of Salvatore Cezar Pais in the patent should be enough to put this to bed for serious folks. https://news.ycombinator.com/item?id=36967333 In case you aren't familiar with the man's work, here are some highlights of his discoveries over the last decade: Conditional possibility of spacecraft propulsion at superluminal speeds High frequency g…

Cited patents are added by the examiner. Source: I have several patents.

Re: Electronic Structure of LK-99

#313

Post by sebzim4500 » Wed, Aug 02, 2023, 11:59 AM UTC

distortionfield wrote: post #118

keepamovin wrote: post #54

Earlier quoted context omitted.

Lol thank you. That’s hilarious. Also, I think it kind of sucks that all that UFO reverse engineering didn’t yield a high temperature superconductor before this… but I guess what can you expect when you sequester away all your materials, silo your research and in effect keep your neural network of nodes (as scientists) really small. This open shit, as flawed and maybe annoying as it is to some people, I think it’s a…

I’ve seen several tweets implying the gubberment is rushing out RTAPS to “cover up” the alien stuff

They rushed it out by... publishing a paper in a korean journal two decades ago?

Re: Electronic Structure of LK-99

#314

Post by jhrmnn » Wed, Aug 02, 2023, 11:59 AM UTC

samhuk wrote: post #282

My ultimate take-away about LK-99 since the start has been that, even if it doesn't turn out to be a holy-grail or whatever, the novel ideas behind the material are incredibly interesting. The idea of causing tiny (~0.5%) crystal lattice shrinkage with cuprate percolation is a really interesting idea. So far, only huge pressures or very low temperatures (i.e. Physics) have been used to cause that shrinkage, therefore…

Condensed matter physics and materials chemistry certainly become inseparable in certain areas

Re: Electronic Structure of LK-99

#315

Post by objektif » Wed, Aug 02, 2023, 11:59 AM UTC

selimthegrim wrote: post #159

objektif wrote: post #109

Earlier quoted context omitted.

CMTC comes of as a whiny little POS tbh. They have the exact opposite of the attitude I would have expected from a scientist. In their first thread regarding this topic they were almost flat out belittling the og authors. WTF.

Because CMTC has high theory standards and the authors, to put it charitably, didn’t

This is the one from the all infamous University of Maryland correct? lol.

Re: Electronic Structure of LK-99

#316

Post by Mistletoe » Wed, Aug 02, 2023, 12:03 PM UTC

aqme28 wrote: post #258

hcks wrote: post #247

Earlier quoted context omitted.

This is sad man. You’re getting excited at manufactured hype on twitter

What makes this hype "manufactured"? I've been very hyped as well ever since I read the arxiv.

Well it isn’t peer reviewed for one.

I don’t think people that are a little skeptical are being negative they are just being realistic. We’ve experienced things like this before and some of the hallmarks of the ones that let us down are there in this one.

https://en.wikipedia.org/wiki/Pathological_science

Re: Electronic Structure of LK-99

#317

Post by selimthegrim » Wed, Aug 02, 2023, 12:06 PM UTC

objektif wrote: post #315

selimthegrim wrote: post #159

Earlier quoted context omitted.

Because CMTC has high theory standards and the authors, to put it charitably, didn’t

This is the one from the all infamous University of Maryland correct? lol.

They may have been throwing a bit of shade around lately but they are by and large reputable scientists barring whatever SDS’s past MA announcement involvement was. It’s more than just him there.

Re: Electronic Structure of LK-99

#318

Post by itsoktocry » Wed, Aug 02, 2023, 12:07 PM UTC

xvector wrote: post #213

jurgenaut23 wrote: post #210

Earlier quoted context omitted.

Beyond the raw scientific excitement, can you explain how this would affect mankind (positively and, of course, perhaps negatively)?

Impact of superconductors: https://threadreaderapp.com/thread/1685088625187495936.html

"1970: Superconducting trains to go from New York to LA in 20 minutes!"

50+ years later the US has how many high speed trains, of any kind?

Re: Electronic Structure of LK-99

#319

Post by kitd » Wed, Aug 02, 2023, 12:07 PM UTC

dasudasu wrote: post #312

irthomasthomas wrote: post #227

Earlier quoted context omitted.

I think we're being trolled. Or trawled. Not sure which, yet. But the mention of Salvatore Cezar Pais in the patent should be enough to put this to bed for serious folks. https://news.ycombinator.com/item?id=36967333 In case you aren't familiar with the man's work, here are some highlights of his discoveries over the last decade: Conditional possibility of spacecraft propulsion at superluminal speeds High frequency g…

Cited patents are added by the examiner. Source: I have several patents.

Source: I have several parents

Ahem :)

Though it may depend on what the patents are for!

Re: Electronic Structure of LK-99

#320

Post by itsoktocry » Wed, Aug 02, 2023, 12:13 PM UTC

groby_b wrote: post #49

vesinisa wrote: post #26

Earlier quoted context omitted.

Just curious, how did you find Covid "exciting"? Making lots of money on the bear market?

Emotionally, it was horrible. Societally, it was depressing to see that we'll never be able to tackle any true large problems, we can't even agree on wearing a piece of paper to protect fellow humans. But scientifically? Yeah, I'll go with "exciting". The field seemed to move at a tremendous speed, or at least that's how it looked to me as an outsider. Sequencing within less than a week, extremely rapid movement on t…

>But scientifically? Yeah, I'll go with "exciting". The field seemed to move at a tremendous speed, or at least that's how it looked to me as an outsider.

The practical science may have been exciting. Unfortunately "The Science" has been forever tainted thanks to secrets, tight-lips, mis-direction and "just trust us".

I think Covid was a net-negative for science.