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

Family, the Korean team is back to work again!

Just now, Hyun-Tak Kim, one of the authors of the paper, released a new video showing a suspended LK-99 sample.

This is the latest video:

This is the previous video:

As you can see, the LK-99 sample in the video is a semi-uniform rectangular prism, which is obviously different from the one in the previous paper. And more importantly, the sample was successfully suspended at 25.8 °C.

In this regard, netizens exclaimed: "I'll screw you!"

Some careful netizens also found that:

This does not seem to be the sample in the paper. Have they reproduced several pieces already?

Some netizens questioned that the video was not good enough, saying directly:

This is not a superconductor, and if it is, it can be proved by simply tilting a magnet.

Netizens started to estimate the magnetic susceptibility, of course, in addition to a large number of exclaimed "Wang Defa" and questioned netizens, there are also some netizens itching to sit still, have started to calculate the magnetic susceptibility of video LK-99 samples.

The man on Reddit gave his own test process.

The magnet is about 1 inch wide and 0.25 inch thick (that is, 6 mm), assuming that the sample floats at the same thickness from the magnet.

Based on the sample size and floating height, according to the magnetic field calculation tools on the Internet, the sample magnetic field intensity should be between 0.2 and 0.25 T.

According to Wikipedia, the density of the material is 6.699 grams per cubic centimeter, and using the method of equivalent magnetic energy and potential energy, the magnetic susceptibility is about 2.5 x 10 ^-3.

Compared with the known superconductor YBCO (lanthanum yttrium barium copper oxide), because of its magnetic susceptibility of-1, only a small magnet or magnetic field is needed to levitate.

For graphene, as an ordinary material, its magnetic susceptibility is very small, about-40 x 10 ^-5, so the levitation height above the magnet will also be very low.

By comparison, the magnetic susceptibility of the video sample material is closer to graphene than to the known superconductor YBCO.

According to the magnetic susceptibility of the ideal superconductor-1, netizens finally come to the conclusion:

The sample in the video has strong diamagnetism, but is not a superconductor.

Of course, this is only a rough estimate made by netizens based on video, and it will take a while for the details.

Provincial flow: LK-99 Progress in South Korea now, the Korean room temperature superconducting LK-99 has become a nesting event of network sociology.

Universities and laboratories around the world pay close attention to "indigenous alchemy", and the South Korean team is also constantly drama, which is not only questioned for winning the Nobel Prize by infighting, but also called by the Korean Society as "insufficient evidence of LK-99 room temperature superconductivity."

In short, in one sentence:

For blowing Sting!

According to the timeline, let's briefly review some of the situation of the LK-99 Korea team.

On July 22, 2023, a paper entitled "the first room temperature and atmospheric pressure superconductor" appeared on arXiv, sparking a huge discussion and began to ferment online.

On July 27, 2023, Hyun-Tak Kim, one of the co-authors of the paper, responded that the paper "the first Room temperature Atmospheric pressure Superconductor" had many defects and was uploaded to arXiv without his permission.

On August 1, 2023, the South Korean team re-uploaded their revised paper on room temperature and pressure superconductors on the arxiv platform. In addition to correcting minor errors caused by format conversion, the test results of another sample have been added.

On August 2, 2023, the Korea Superconductor Society announced the establishment of a LK-99 certification committee and said that a second round of verification would be carried out if Q-center provided samples.

Li Shuopei (Sukbae Lee), the first work of South Korea's room temperature superconductor, said that the paper was uploaded without permission and the content was defective. The team has applied to arXiv to withdraw the manuscript, improve it and transfer it to a regular journal.

On August 3, 2023, the Korea Superconducting Cryogenic Society (KSSC) did not get the sample, and only based on the content of the paper, it was concluded that the sample did not have Meissner effect, so it was not a superconductor.

On August 4, 2023, author Hyun-Tak Kim provided a new video showing a suspended LK-99 sample.

In addition to the official revelations above, there are a lot of gossip, such as questioning whether the author mistook diamagnetism for superconductivity, which is far less significant than room temperature superconductivity.

In a recent interview with Korea Economic Daily, Sukbae Lee, a member of One More Thing's Korea team, said:

The team is currently working on a follow-up study of LK-99 and will explain everything soon.

It also emphasizes that the manufacturing method of LK-99 has been made public, and the reappearance teams around the world should be able to gain something in a month, which will be waiting for everyone to see.

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In addition, Professor Kim Hyun-tak (Hyun-Tak Kim) will soon respond to the samples requested by the Korea Superconducting Cryogenic Society (KSSC).

In addition, new news broke out from the South Korean media.

The Korea Institute of Energy Technology (Korea Institute of Energy Technology) has obtained samples of LK-99 superconductors and studied them for a month.

The institute says it is still in its early stages and has not reached the level of releasing data to the outside world, and it is expected that the analysis will take about six months.

Reference link:

[1] https://www.nytimes.com/2023/08/03/science/lk-99-superconductor-ambient.html/

[2] https://twitter.com/floates0x/status/1687190672280096768/

[3] https://n.news.naver.com/mnews/article/015/0004876178?sid=001/

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