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#superconductivity

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Hari Tulsidas

Physicists continue exploring new superconductivity and superfluidity forms by experimenting with extreme temperatures and pressures. Discoveries such as high-temperature superconductors have revolutionized the field, but what else lies ahead? Could novel materials or exotic states of matter exhibit these properties at more practical conditions? Uncovering these could lead to breakthroughs in energy transmission, quantum computing, and other advanced technologies. #Physics #Superconductivity

Public
Stephen Shankland

Briefly: Our CSMC electromagnet works like a champ, proving out the second of 2 high-temperature superconducting magnet types needed for fusion: steady state and now pulsed current.

It was dramatic watching the testing (at MIT) in real time, like when it hit 50,000 amps current / 5.7 tesla field. #FusionEnergy #Climate #Magnets #Superconductivity

linkedin.com/feed/update/urn:l

www.linkedin.comBrandon Sorbom on LinkedIn: This is a big moment for our team and for fusion energy: After spending…This is a big moment for our team and for fusion energy: After spending the last four years building a prototype magnet called the Central Solenoid Model Coil…
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petersuber

Some 2022 results about #superconductivity are under attack for two reasons: (1) suspicious smoothing of noisy data and (2) refusing to share data "upon reasonable request".
nature.com/articles/d41586-024

"The journal [Nature Communications] has updated its policy for transparency to remove the word 'reasonable' so data are available only 'upon request'."

From Maarten van Kampen: By sharing data "you make yourself vulnerable. But I think it’s good. It is the way it should be.”

www.nature.comSuperconductivity paper spurs dispute as field reels from earlier scandalWhistleblowers raise questions about the processing and sharing of raw data.
#Data#OpenData
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Ben Royce 🇺🇦

I live in #WesternNY so I followed this case.

It's a great piece of #investigative #reporting by #Nature's news team. which they are careful to note is independent editorially from the science journal.

TLDR:

Dude fabricates #superconductivity research, destroys his career,
poisons his students' careers,
sullies #UniversityOfRochester's reputation,
and brings into question the credibility of Nature's review process.

What a FUBAR.

nature.com/articles/d41586-024

www.nature.comSuperconductivity scandal: the inside story of deception in a rising star’s physics labRanga Dias claimed to have discovered the first room-temperature superconductors, but the work was later retracted. An investigation by Nature’s news team reveals new details about what happened — and how institutions missed red flags.
#science#research#physics
Public
Hari Tulsidas

The last week of July 2023 was remarkable for physics, as two major breakthroughs were announced in superconductivity and nuclear fusion. Superconductivity is the phenomenon of zero electrical resistance and perfect diamagnetism in certain materials at very low temperatures. Nuclear fusion combines two lighter nuclei into a heavier one, releasing enormous amounts of energy. #Superconductivity #NuclearFusion #Physics newsweek.com/superconductor-nu

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Hari Tulsidas

Scientists have achieved room-temperature superconductivity for the first time in history. This breakthrough defies the conventional theory that superconductivity can only occur at very low temperatures. It could revolutionize the fields of energy, transportation, medicine, and computing.

#Superconductivity #Science #Breakthrough

thehindubusinessline.com/news/

Public
Fabian Laasch ⚡️🔋

#lk99 It's a ferromagnet 😢

"We argue that, together with the pronounced shape anisotropy of the small fragments, the soft ferromagnetism is sufficient to explain the observed half levitation in strong vertical magnetic fields. Our measurements do not indicate the presence of the Meissner effect, nor zero resistance, in our samples, leading us to believe that our samples do not exhibit #superconductivity."

arxiv.org/abs/2308.03110

Public
✨🇪🇺 Mia’s Simulacrum 🏳️‍⚧️✨

We have the first independent partial validation of LK99.

arxiv.org/abs/2308.01516

Here are a few notes of mine:

This paper only proves magnetic levitation, not superconductivity directly.

There is something called the Meissner effect that would indicate that this is a superconductor, but in the paper, they only confirm that there is strong diamagnetism, which is not proof for the Meissner effect, as far as I know.

However, we have a theoretical paper that simulated LK99, stating:

"If doped such an electronic structure might support flat-band
superconductivity or an correlation-enhanced electron-phonon mechanism, whereas a diamagnet without superconductivity appears to be rather at odds with our results."

arxiv.org/pdf/2308.00676.pdf

So, we have one paper that observes a phenomenon potentially related to superconductivity, and another paper concludes that it's 'difficult to imagine' the observed phenomenon occurring in the absence of superconductivity.

Quite promising!

Let's wait for some actual resistance measurements and more replications before jumping to conclusions and begin to party!

Also, I have no knowledge in this field. I can only observe the scientific process, and that's about as far as I get.

arXiv.orgSuccessful growth and room temperature ambient-pressure magnetic levitation of LK-99Recently, Sukbae Lee et al. reported inspiring experimental findings on the atmospheric superconductivity of a modified lead apatite crystal (LK-99) at room temperature (10.6111/JKCGCT.2023.33.2.061, arXiv: 2307.12008, arXiv: 2307.12037). They claimed that the synthesized LK-99 materials exhibit the Meissner levitation phenomenon of superconductors and have a superconducting transition temperature (Tc) higher than 400 K. Here, for the first time, we successfully verify and synthesize the LK-99 crystals which can be magnetically levitated with larger levitated angle than Sukbae Lee's sample at room temperature. It is expected to realize the true potential of room temperature, non-contact superconducting magnetic levitation in near future.
#LK99#superconductivity#superconductor
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