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Electronic Structure of LK-99

arxiv.org

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Re: Electronic Structure of LK-99

#151

Post by SamPatt »

bluecoconut wrote: post #73
SamPatt wrote: post #23

Earlier quoted context omitted.

Thanks for your input. What would you need to see to say "I am 100% convinced this is / isn't real"? And how long would you expect it will be before that occurs?

I'd probably approach 90% confidence with ~2-3 different measurements from different labs showing similar stories. Select from the grab bag of possible experiments that could all collaborate and provide consistency in their stories: specifically things like measuring the critical current, critical magnetic field, high quality electrical resistance in various ways (lots of transport), STM measurements of gaps, ARPES m…

Thanks for your thoughts!

Re: Electronic Structure of LK-99

#152

Post by xorbax »

jvm___ wrote: post #53
dralley wrote: post #30

My understanding is that the "99" in LK-99 is the year it they first synthesized the material, i.e. 1999. Assuming this is all true, why is it just now coming to light? Did they just not know what they had? (I have not been following this closely, maybe this has already been explained)

Uniformed opinion. It takes a week to bake/whatever a test sample. Which is why this is playing out so "slowly". So, they had an idea and have been baking/testing/refining samples for decades. Science and funding takes a while. What idea they started with and why they kept at it for 20 years is beyond me, that's a long time to chase an idea of you didn't have results or a hint that your idea would work. Maybe they ha…

I have the same thought: "25 years? Why the fuck. Buy a new salt and publish a fucking paper."

I suppose they saw something favorable in that 99 sample and nobody else knew. The vagaries of chemical synthesis helped.

But it doesn't seem like they could have had a worse sample than what they fucking have now, while getting data that made them waste a quarter-century.

As much as people hype and have 'reproduced' it, I...dunno. If it's real, the autobiography will be worth an expensive translation.

Re: Electronic Structure of LK-99

#153

Post by drak0n1c »

NotYourLawyer wrote: post #59
jeffbee wrote: post #16

The most interesting phenomenon revealed so far is that the room-temperature superconductor people and the generative-LLMs-are-God people draw on the same limited global pool of credulity, such that HN cannot be flooded with both ChatGPT worship and superconductor speculation at the same time.

And together, these two phenomena have just sucked all the energy out of the crypto excitation mode.

If thanks to those technologies new hyper-efficient compute and network hardware becomes the norm, and there is no meaningful difference between decentralized hosting and centralized hosting of services/apps/games, crypto will likely see renewed interest.

People are still unhappy with the decisions of single IP owners controlling the platforms and games they use on a daily basis. Decentralized ledger technology, whether blockchain or not, offers an alternative.

Re: Electronic Structure of LK-99

#154

Post by ewoodrich »

xtracto wrote: post #127
JamisonM wrote: post #113

Earlier quoted context omitted.

> 3. In May we find out apparently our government has recovered alien technologies This is a silly thing to include on the list since it doesn't seem to be true?

What's up with that uh? I read about the swore statements during the depositions, and all the mainstream media news, but for some reason HN had radio silence. Is there something I missed that shows it's all shenanigans?

People say a lot of things in sworn testimony to Congress. It's a data point but not a particularly strong one.

Re: Electronic Structure of LK-99

#155

Post by carabiner »

Zpalmtree wrote: post #146
carabiner wrote: post #101

Earlier quoted context omitted.

Yeah the techbros have been the worst. Coffee guy went from saying the first DFT paper should deserve a Nobel to, "it's not a strong signal of anything" in 12 hours. WTF. All the actual scientists have been rock steady at, "it is probably not going to replicate," especially CMTC. Techbro speculation on physics should be considered harmful.

> tech bro speculation on physics should be considered harmful why?

Unfounded hype is bad and they're usually low-key trying to gain attention for their failing startups.

Re: Electronic Structure of LK-99

#156

Post by Accujack »

swalsh wrote: post #95
jeffbee wrote: post #16

The most interesting phenomenon revealed so far is that the room-temperature superconductor people and the generative-LLMs-are-God people draw on the same limited global pool of credulity, such that HN cannot be flooded with both ChatGPT worship and superconductor speculation at the same time.

It's so hard not to be crazy excited about the future. The past few months are proving to be an absolute breakout for the literal human race. So far we've seen: 1. in Dec 2022 We saw a fusion breakthrough seeing a net gain in energy 2. In March GPT-4 was released, which seems to be a seminal breakthrough in AI, and maybe of our first glimpse in what could become an AGI. 3. In May we find out apparently our government…

[flagged]

Re: Electronic Structure of LK-99

#157

Post by Baeocystin »

oceanghost wrote: post #150
Baeocystin wrote: post #104

Earlier quoted context omitted.

Serious question- I saw the original video, where once they stopped waving the magnet around and held it near the sheet of LK-99, it looked to me like it stayed at a specific standoff distance, with no decay. Assuming no videographic trickery, what else could it be, other than the Meissner effect?

A diamagnetic material. "In simple terms, diamagnetic materials are substances that are usually repelled by a magnetic field. Electrons in an atom revolve around the nucleus, and thus possess orbital angular momentum. The resultant magnetic momentum in an atom of the diamagnetic material is zero."

Am I correct in my understanding that being capable of self-levitation would be an unusually strong example of the diamagnetic effect?

Re: Electronic Structure of LK-99

#158

Post by fnordpiglet »

dralley wrote: post #30

My understanding is that the "99" in LK-99 is the year it they first synthesized the material, i.e. 1999. Assuming this is all true, why is it just now coming to light? Did they just not know what they had? (I have not been following this closely, maybe this has already been explained)

There are various timelines on HN and elsewhere but it boils down to essentially they saw some blips on sample measurements that they assumed were errors. But the head of their lab thought differently and as he was dying asked his former students to reinvestigate it. They secured funding in 2018 but it was a bumpy road with personality conflicts etc.

Re: Electronic Structure of LK-99

#159

Post by selimthegrim »

objektif wrote: post #109
carabiner wrote: post #101

Earlier quoted context omitted.

Yeah the techbros have been the worst. Coffee guy went from saying the first DFT paper should deserve a Nobel to, "it's not a strong signal of anything" in 12 hours. WTF. All the actual scientists have been rock steady at, "it is probably not going to replicate," especially CMTC. Techbro speculation on physics should be considered harmful.

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

Re: Electronic Structure of LK-99

#160

Post by NovaDudely »

SamPatt wrote: post #47
jeffbee wrote: post #16

The most interesting phenomenon revealed so far is that the room-temperature superconductor people and the generative-LLMs-are-God people draw on the same limited global pool of credulity, such that HN cannot be flooded with both ChatGPT worship and superconductor speculation at the same time.

The least interesting phenomenon revealed so far is that HN is split into a group who are entertained by watching and discussing emerging tech / science news, and a second group who are entertained by disparaging the first. I enjoy watching floating rocks and talking to computers.

I would say I am in both worlds. Not too excited about a lot developments in computer tech, but mostly because there is a lot of hype on technology that tends be impressive BUT misses the mark on the bold claims.

But with this LK99 stuff, there is not much room for vague wiggle room. The requirements are very clearly defined and if they do it. It is done! It isn't a case of "if in 5 years and $X billion we may be able to produce this stuff", it is a case of they showing a working material.

It is hard not to be excited for this!

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