Researchers claim to achieve room temperature/ambient pressure superconductivity

[RnR_au]

The South Koreans are doing a presentation in March;

March 24, 2024, 8.12am - 8.14am -> American Physical Society meeting, Minneapolis, Minnesota -> HyunTak Kim, eminent physics professor from the College of William and Mary, is scheduled to present on superconductivity. Notably, the abstract reveals:
> JH Kim, the heroic experimental chemist (the K, in LK-99), is no longer part of the team, leaving Lee as the principal author from Quantum Energy Korea
> The compound from Aug has been characterized further, no longer a mere lead apatite, but now PCPOSOS, with substitutions of Sulphur for Oxygen in some positions
> They don’t even claim the LK-99 name anymore (because that would, uh.. refer to a different compound)
> However, the team has confirmed Type-II superconductivity at room temperature and pressure, confirmed the Meissner effect, explained the partial levitation seen (it’s because the critical magnetic field that knocks out the superconductive effect is close enough that normal variation in magnetic field strength trigger the threshold)

From https://nitter.net/8teAPi/status/1742393292741120074
So like the Chinese above also using Sulfur.

 

[cytg111]

MARCH?

Superconductor today, Fusion tomorrow. Move move move move move damnit….

 

[RnR_au]

I didn't see anything there extremely convincing.

The Chinese are playing it careful. From the twitter/nitter thread above;

For the uninitiated, having been so terribly burned by LK-99, no one wants to mention superconductivity again until they are absolutely sure.

I guess the fact that the South Koreans mention superconductivity in their session abstract means that they are still bullish

Link to the March session;

APS -APS March Meeting 2024 - Event - Partial levitation, type-II-superconductor characteristic, at room temperature and atmospheric pressure in PCPOSOS

 

[RnR_au]

An update;

A researcher behind the new potential room-temperature superconductor just gave a new interview.

Highlights:
• They have only synthesized " a few hundred nanometers" of the new material so far
• They recognize the limitations of their data to draw a final conclusion — and they are continuing to be careful, just calling it data that POTENTIALLY indicates superconductivity
• They believed they have fully ruled out ferromagnetism as a potential explanation of their results
• The next step is to get up to "micrometer scale or larger" in their synthesis to give them more to test• After they do, they will continue testing with the other, more normal tests of superconductivity: "Common ways to verify superconductivity include 4-probe DC resistance measurement, vibrating sample magnetometer for Meissner effect, specific heat jumps, Josephson effect, scanning tunneling microscopy, [and] photoemission spectroscopy."

Upside down full levitation in a magnetic field;


Source

 

[cytg111]

Yea we’re all recovering burn victims here… But march is a long ways off surely we’ll see it reproduced elsewhere before that.

 

[RnR_au]

Yea we’re all recovering burn victims here… But march is a long ways off surely we’ll see it reproduced elsewhere before that.

Indeed. I'm getting excited again, so I need to check my supplies of burn cream.... just in case.

 

[RnR_au]

A bit of a summary of the recent news. Love the editor note

Editor’s note: The science communication role means you are one part technical translator and one part perpetual jilted lover. Science is a harsh taskmaster and, more often than not, “breakthroughs” can barely break through the door of replication efforts, or are doomed to never scale outside of the lab. Last year, a team of Korean scientists reported that they achieved room-temperature superconductor using a modified lead-apatite — LK-99 — structure. Replication efforts did not go so well. Now, it seems a team of Chinese scientists, from respected institutions, have reported success with a modified LK-99 investigation. At the risk of being stood up at the altar of the scientific method yet again, and understanding the duty to inform the community, here is a cautious summary of the paper guided by some social media commentary — along with an earnest hope for peer review and an entreaty to not shoot the messenger even as I hear a round slide into the chamber:

It's Back: Researchers Say They've Replicated LK-99 Room Temperature Superconductor Experiment

Researchers say a copper-substituted lead apatite (CSLA) may serve as a candidate for room-temperature superconductivity.

thequantuminsider.com

 

[hal2kilo]

A bit of a summary of the recent news. Love the editor note

It's Back: Researchers Say They've Replicated LK-99 Room Temperature Superconductor Experiment

Researchers say a copper-substituted lead apatite (CSLA) may serve as a candidate for room-temperature superconductivity.

thequantuminsider.com

You should follow the CF world this is barely controversial. Looks like Nature is finally going publish something soon even after several comments from readers who live in the old physics world complained. Since when are reader comments peers in the science.

 

[RnR_au]

A bit of news on what is going on behind the scene of the South Koreans. Seems patents and paper reviews are gumming up the release of further data and samples.

Also interesting is the news that IBM may be working with them.

Korean LK99 Variant Superconductor Partial Update Highlights | NextBigFuture.com

Here are the highlights of Sukbae Lee's (L in LK99, room temperature superconductor) private superconductor update.

www.nextbigfuture.com

 

[cytg111]

LEEEEEEETS GOOOOOO

 

[Tsinni Dave]

Hopefully we get landspeeders. Sadly, this reality will probably just give us those floating robot drones that stick needles into people.

 

[RnR_au]

Sadly, this reality will probably just give us those floating robot drones that stick needles into people.

I am saddened by your lack of faith in our glorious future. Robot drones have been dispatched to your location with behavioural adjustment medicine.

 

[RnR_au]

A couple of tidbits;

Asked what her gut feeling is about whether the superconductivity claims will pan out, Griffin responds: “I almost sound like a crazy person when I answer this, but I think it is a superconductor. I just say that it’s very, very hard to synthesize
...
The Chinese work placing sulfur in the wrong places ensures that copper (Cu) get substituted in the right place when a substitution occurs.

Berkeley Supercomputer Modeling and Chinese Experimental Research Says LK99 Variant Superconductors are BACK! | NextBigFuture.com

Sinéad Griffin, a theoretical physicist at the Lawrence Berkeley National Laboratory, and other experimentalists at Lawrence Berkeley National Lab have

www.nextbigfuture.com

 

[cytg111]

*WHY* is this thread so quiet?

 

[hal2kilo]

From the CF site I lurk at. Is this loud enough?

LK99 Room Temperature and Room Pressure Superconductor Verification Evidence Coming in Peer Reviewed APL Paper | NextBigFuture.com

Hyun Tak-Kim, the K in LK99 korean discover possible room temperature and room pressure superconductivity provided details about the American Physical Society

www.nextbigfuture.com

 

[Ajay]

*WHY* is this thread so quiet?

Maybe some people have my take on these sorts of things - when they reach pilot production levels - I'll get excited. Till then, it's just toys for the materials science guys (which is necessary - but often annoying with all the stupid headline grabbing announcements b/4 mainstream publishing and confirmation).

 

[uclaLabrat]

You should follow the CF world this is barely controversial. Looks like Nature is finally going publish something soon even after several comments from readers who live in the old physics world complained. Since when are reader comments peers in the science.

If the comments are rational and valid based on the study design, the format/commenter matters not a whit.

 

[RnR_au]

Chinese researchers have detected the Josephson effect in their samples of LK99. Nothing officially posted yet from my understanding.

 

[hal2kilo]

MARCH?

Superconductor today, Fusion tomorrow. Move move move move move damnit….

Lev trains would be a much better use and could happen tomorrow. Capturing extremely hot plasmas in a magnetic doughnut, not so much.

 

[RnR_au]

From a Korean team. Left is a copper plate, right is a sample.

Paper is on hold at arxiv.

Experimental Replication Data of Room Temperature Superconductors Posted by SCT Corp | NextBigFuture.com

SCT Corp is a different South Korean group from the original Korean team working on room temperature superconductors. Dae-Chel Jung is one of the researchers

www.nextbigfuture.com

More coverage (thread);

https://twitter.com/x/status/1765620049539465523

 

[Zorba]

I think even if this specific material is impossible to scale, I think proving it's possible will flood the field with money. Kind of like what happened with the transistor, the original ones were made of germanium and gold foil, they would've never scaled. But their invention pushed people to relook at silicon and developed successful silicone transistors.

 

[hal2kilo]

Lev trains would be a much better use and could happen tomorrow. Capturing extremely hot plasmas in a magnetic doughnut, not so much.

I also propose an alternate use.

 

[Pens1566]

I also propose an alternate use.

I love how he has to clarify with "The Baron" as if there are multiple floating fat men.