這里有個英文版字幕 (srt)

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LK-99

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Is this really a superconductor or not? It's been all the talk

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When SE!ZE met with the author of the paper who uploaded this video,

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The author said like this

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There's no other way

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Other than superconductivity

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There's no way to explain it

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Today’s

[music]

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It's LK-99

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[New Thing]

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Q. Why didn't you first release important research as a formal paper?

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Originally, my style is to submit papers to journals

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And after the review process

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I usually post it on arxiv. just before it goes public

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But there's a story behind it

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There's a story

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So there was a reason why we had to hurry and release it like this

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So we submitted the paper to the journal and released it at the same time

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We had to do it this way because of an unavoidable situation

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Q. Two of the same papers were posted on the arXiv. Why?

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One didn't get the author's consent, the other did

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The one with many authors is the one where all the authors agreed and went through the regular procedure

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The other one has an ethical issue because it didn’t follow that procedure

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Q. The Korean Superconductivity Society requested a sample for verification.

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Now, about the sample, our research team has agreed to

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help Korean physicists with their research

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And they have agreed to provide the sample

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But they will verify it? That's a different issue

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That's another issue

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Q. There's a rebuttal saying why isn't the resistance 0?

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When the resistance in a metal drops discontinuously towards the lower side

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Isn't it superconductivity?

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That's true even if you redo the measurement

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Because whether the resistance is 0 or not it’s like…

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If the resistance is 0, it seems like noise

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The experiment already has noise coming out

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And the research team published a Korean paper on this

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The Korean paper was the first to be published

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In the Korean paper

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data with noise is included.

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So if you wanna see the data? Then check that out.

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About if the resistance of the superconducting state is 0 or not

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There was a debate about this 100 years ago

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It's something that always follows when superconductivity is observed

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The Jump has already measured,

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So it's obvious, and

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when tested again, it came out as 0,

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It’s in the first paper

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so we don't need it in the second paper, right?

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People all over the world were massively asking for samples,

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so there's no time to waste, right?

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We already know the results

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Q. Why didn't LK-99 completely levitate in the video?

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It should have completely levitated, but it didn't.

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What does it mean to be one-dimensional?

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When you draw one dimension on a plane, you draw one line.

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When one dimension becomes metal,

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what's next to it?

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It becomes non-metal

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When measured, the two appear together,

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so you can't make a very homogeneous sample

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So I think that’s why it’s tilted

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I see it that way

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So if we continue to develop technology,

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we can develop it a bit more,

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but it won't improve as much as the current 2D, 3D superconductors

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But I hope we could technically

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carve out a one-dimensional line, right?

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We would make it with that,

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so that's the area where technological development is needed in the future.

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We need to develop a lot in that direction.

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This study is just the beginning, isn't it?

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Q. How did you get involved in this research?

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When my paper came out in 2021,

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they(Quantum Energy Research Institute) said they seemed to have made superconductivity.

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And Professor Oh Geun-ho saw my paper

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and thought they were lacking in theory,

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so, since they are all Korean,

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he asked ETRI for the phone number on his smartphone and called me

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Q. How can you tell if it's a superconductor?

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What's the first moment to tell if it's superconducting?

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The characteristic of gap-no gap transition is

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that there is a jump. A jump.

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There's a discontinuous jump between the state with an energy gap and the state without it.

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So, whether it's superconducting or not,

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the jump exists in the direction where the resistance drops in the metal.

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What is that, that…

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When there is the jump like that, it’s superconducting.

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Q. There are suspicions that it's an MIT material, not a superconductor

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If the jump happens to increasing of resistance,

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It’s Metal-Insulator Transition(MIT)

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That's a transition to an insulator.

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In the case of going to metal, it's superconducting

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[The detail explanation of the interview will be uploaded next week]