Top Student

The fly in the ointment is that this experiment did not discover superconductors at room temperature after all.

But in any case, this is already a very successful scientific research topic.

Not only have four new substances that can produce superconductivity at higher temperatures been discovered.

More theoretically, the reason for this phenomenon has been explained.

After Yuan Dong knew that Xu You had made these achievements, he was also a little envious.

The amount of data that Yuan Dong usually measured was several times that of Xu You, but he did not get such ideal results.

"Xu You, is this Mr. Qiao's project? It really went well this time. Only dozens of sets of data were measured, and four superconducting substances were obtained. You know that I usually measure hundreds of sets of data, and I may not be able to Get such an ideal set of data."

Yuan Dong thought that Xu You, like himself, was just mechanically measuring the properties of various materials.

What they didn't know was that Xu You had already completed theoretical analysis and calculations before measuring.

"Senior, the subject is actually my own, but Teacher Qiao really helped me a lot."

"Of course, Mr. Qiao is very good to students... wait, wait a minute, you said... what? This is your own... experimental topic?"

For a while, Yuan Dong didn't immediately realize the meaning of Xu You's words.

Originally, it was very rare for Xu You to enter the laboratory early at this age.

Yuan Dong thought that Xu You was just practicing his hands through measurement experiments first.

Unexpectedly, this turned out to be Xu You's own subject.

"Yes, I made some theoretical analysis models before, and speculated that these materials may exhibit superconducting properties at higher temperatures. Teacher Qiao was not worried that my theory was wrong, so he just let me do it."

At this moment, Yuan Dong's sense of superiority as a master's degree in the Department of Physics of Ji University completely collapsed.

I originally thought that everyone was just a research dog.

I repeat boring experiments every day, dreaming that one day, I can make the ideal data.

But it turns out that only Yuan Dong himself is a scientific research dog.

Xu You, you are a real scientific expert!

After completing the experiment at this stage, and after data processing.

Xu You once again had a face-to-face communication with Qiao Sen.

"Teacher, it is not too surprising in the world to achieve a superconducting critical temperature of 100K. I see that some laboratories have achieved 250K superconductivity."

250K, converted into Celsius, is about minus 23 degrees Celsius.

Just from the temperature point of view, it is very close to room temperature superconductivity.

Johnson shook his head upon hearing this.

"You can't just look at the superconducting critical temperature. Those so-called superconducting phenomena close to room temperature are all done under extremely high pressure. The time you mentioned 250K, the pressure reached 170GPa. What is that concept? ? More than 100,000 times the standard atmospheric pressure, which is equivalent to half of the pressure at the center of the earth."

"Teacher, such a high pressure is very difficult to achieve, right?"

"Yes, it is even more difficult to achieve than low temperatures close to absolute zero. It can be said that the room temperature superconductivity we need is, strictly speaking, room temperature superconductivity at normal pressure. High temperature superconductivity obtained by using high pressure cannot It can be regarded as high-temperature superconductivity in an ideal sense. The original intention of room-temperature superconductivity is to avoid harsh environments. Using high pressure to achieve high-temperature superconductivity can be said to be a contrary thing.”

"But it also makes sense, right?"

"Of course, there must be meaning. It's just that temperature is not the only indicator to measure the value of a superconductor. Just like the magic-angle graphene superconductivity that everyone is familiar with before, although the superconducting temperature is only 1.7K, it can Under the carrier concentration, superconductivity is realized, and this is where its great breakthrough occurs."

Xu You is also very familiar with the superconductivity of magic-angle graphene.

Superconductivity occurs when two parallel layers of graphene are stacked at a subtle angle of about 1.1°.

Through the research on the superconducting properties of graphene, this young researcher has been published in the journal "Nature" many times.

Next, Qiao Sen and Xu You discussed other issues on this topic, and pointed out the next direction for Xu You.

"Now your research results are very good, but there is still a lot of work to be done. At the beginning, because there were too many types of materials, we certainly could not measure too many properties for each material. But now, several Superconducting materials have been screened out, and we can continue to measure more dimensions for these materials."

"Teacher, in addition to complete conductivity, you also need to verify the complete diamagnetism of superconductors and the properties of flux quantization, right?"

"Yes, the industry's definition of superconductors is not limited to the property of complete conductivity. If you want to define superconductors more strictly, you need to continue to verify the other two properties."

Under Qiao Sen's advice, Xu You continued to measure these types of aluminum clusters with complete conductivity in other dimensions.

The measurement process is long and boring, but fortunately, after a large number of measurements, the experimental phenomenon shows that these kinds of aluminum clusters with complete conductivity also have the characteristics of complete diamagnetism and flux quantization .

The rest is to organize the data, write and translate the paper.

During this period, Xu Zhou also communicated with Xu You to understand the progress of Xu You's project.

"Well, did everything go well?"

"Overall, it is relatively smooth. I am writing a thesis, and the translation is still a bit difficult."

"It's okay, this is only your second thesis, and you'll get used to it by writing more. Dad is still pretty good, right? Without me, you might still be looking for someone to make materials. Leave me a note after the author of the thesis The location, isn’t that too much to ask for?”

"It's pretty awesome. I'll look for you for this job in the future. But it's fine to add your name. You should only be regarded as a material supplier."

"If you want to say that, in the future, I can directly test the materials I create and write my own papers."

"Dad... You, you can't be moral?"

"Okay, just kidding. Except for me, our experimental team has no idea what you want these materials for. And we don't have measurement equipment, no theoretical basis, and we can't write a paper at all. You can rest assured. "

"Well, then you are busy, I will contact you if I have any questions."

After that, Xu You concentrated on the work of the thesis, and with the help of Qiao Sen and others, completed the review and proofreading of the thesis.

In the end, Qiao Sen was in charge and submitted the paper to the journal "Nature".

This time, Xu You has the identity of the author of the PRL journal paper, and the introduction of the author has finally become a lot more confident.

The initial review passed quickly and smoothly, but further review after that still requires a long wait.

During this period, there was also new news about the "Sea Island" new-generation quantum computer project.

Both Wang Xiangwu and Qiao Sen's labs received their respective experimental topics.