Shulou(Shulou.com)11/24 Report--

Recently, as soon as the paper "the first superconducting at room temperature and atmospheric pressure" was released, it aroused discussion from all walks of life. The attention is very high, but also very controversial!

Not only did the industry begin to question it, but even the collaborators of the paper jumped out and said:

There are many defects in the content.

What exactly is going on?

Author: uploading papers without permission is currently on arXiv. There are two papers on LK-99 superconductors, and this one has sparked discussion recently.

In this paper, the researchers modified a lead-apatite structure, using copper ions instead of lead ions, resulting in stress and distortion in the microstructure, so as to show superconductivity below 127℃, and found a new superconductor named LK-99.

In addition to this paper, the research team released another paper at the same time, of which Hyun-Tak Kim is one of the authors.

The second paper explains in detail the new breakthrough material LK-99, which is the core of the first paper (the first room temperature and atmospheric pressure superconductor).

One of the collaborators, Hyun-Tak Kim, is a professor of physics at William and Mary College, majoring in condensed matter physics and quantum information science. His papers have been cited more than 8000 times.

After the paper was released, Hyun-Tak Kim told New Scientist that both papers used the same method, but there were many defects in "the first Room temperature Atmospheric Superconductor" and said angrily:

Upload the paper to arXiv without your own permission.

In addition, he also explained the "Meissner effect" in the paper.

According to his account, although there is video evidence of the "Meissner effect", only one plane is suspended, so only part of it is actually a superconductor.

In addition, there is another thing worth pondering.

In fact, as early as April this year, there was a study on LK-99, published in the Korean Journal of Crystal growth and Crystal Technology. Among them, the authors of both arXiv papers are listed, but there is no "Hyun-Tak Kim".

Not only that, some of them even applied for LK-99 patents in August 2022.

Based on these facts, it can be found that the team discovered the LK-99 superconductor in August 2022.

The team then applied for a patent, published the paper in South Korea in April 2023, and published it on arXiv in conjunction with Professor Hyun-Tak Kim in July.

At the same time, the "three Korean scholars" in the team published a separate paper and used the first term of room temperature and atmospheric pressure superconductivity to describe the study.

There are only three authors for this paper, said Ted Sanders, a technical researcher at OpenAI.

The Nobel Prize is won by three people at most (the purpose is not simple).

It is well known that the papers on arXiv have not been peer-reviewed (peer review) in the industry, and there have been many own dramas in this field before.

Therefore, seeing this paper on superconductivity at room temperature and atmospheric pressure, many scholars and Daniel also picked up the magnifying glass and looked carefully to see if there was a problem.

Some scholars have found that there are a lot of important data missing in the paper.

For example, the paper only uses the results of a magnetic levitation experiment to prove the "Meissner effect", and there is no data on magnetic susceptibility.

Magnetic susceptibility is one of the important bases to judge whether the material enters the superconducting state or not.

(there are two bases for the material to enter the superconducting state: the magnetic susceptibility mutates to-1 under certain conditions, which has complete diamagnetism; the resistance suddenly disappears and has absolute zero resistance)

In this regard, Susannah Speller, a professor of materials science at the University of Oxford, said that there was no corresponding data support, saying that it was too early to find room temperature and atmospheric pressure superconductors.

In addition, it has been suggested that it is strange that the electron tunneling interval between quantum wells is between 3.7 and 6.5 Amis, hoping to explain the electron pairing mechanism involved.

In addition, at a high temperature of about 400k, LK-99 can not carry too much current in the superconducting state.

According to the paper, the research team has a voltage equal to 0 at 389K (about 125 ℃), but the critical current is only about 7 Ma, which is almost 100000 times lower than the practical standard of 1000 A.

As for the question of practicality, some scholars believe that this is science, so don't just cling to a few mistakes.

And said that according to the paper to copy the experiment should be very fast, can wait, and popular science room temperature atmospheric pressure superconductors will bring a series of great impact on real life.

Even directly released this picture of future life full of maglev, imagining a wave.

No matter what the result is, this paper has attracted a lot of attention in the industry. I don't know whether the industry celebrities can repeat the experiment.

Finally, as netizens said, science is to question, and what is not questioned is "pseudoscience".

Reference link:

[1] https://www.science.org/content/blog-post/breaking-superconductor-news/

[2] https://www.science.org/content/blog-post/breaking-superconductor-news/

[3] https://twitter.com/alexkaplan0/status/1684044616528453633/

[4] https://twitter.com/sandersted/status/1684108801035882497/

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