Chapter 94 Another explanation of condensed matter physics

Qiao Sen took Xu You to another laboratory.

"This place also belongs to our experimental group. You can practice hard in the past few days. After the material preparation is completed, you can start the experiment. By the way, there are also your acquaintances here. If you have any questions, you can rest assured.

Ask, don’t feel restrained.”

"Acquaintance?" Xu You asked in surprise.

Xu You thought, he was just a freshman, how could he still meet acquaintances in the laboratory.

"Huh? Senior!"

Sure enough, after entering the laboratory, Xu You found someone he knew.

It was Yuan Dong who guided their experiments when they were in the national training team for sports sports.

"Xu You? Why are you here?"

Yuan Dong was also very surprised to see Xu You.

"Ha, Teacher Qiao asked me to come over and study."

"Well, Yuan Dong, you happen to be doing experiments on condensed matter, so let Xu You follow you and learn a bit. You have known each other before, so you won't be too constrained by each other."

"Okay, I understand, Teacher Qiao."

After Qiao Sen left, Yuan Dong's expression suddenly changed.

"Xu You, are you sure you really need my teaching this time? You have already published your paper on PRL. Don't call me senior anymore. Call me Xiao Yuan."

Now Yuan Dong, in front of Xu You, no longer has the arrogant expression he had when he was in the national training team.

"Senior is joking, I really don't understand anything about condensed matter. Just do your work first, and I'll take a look at it first. After a while, when you're not busy, I'll ask you for advice."

Hearing what Xu You said, Yuan Dong finally felt relieved.

"Okay, it's true that what you studied before was quantum physics, which is very different from condensed matter. But I heard that you attended that conference last time, and you were really awesome. Even the Physics Nation

The team’s coach, Cao Quanli, was not even invited. Your current status is really a bit outrageous.”

"Where, Teacher Wang just took me there by the way. I just went to study, and it shouldn't have much to do with that project."

"Come on, with your outrageous abilities, maybe a new generation of quantum computers will have to be manufactured by you. Frankly speaking, what big project are you going to do this time?"

"Teacher Qiao asked me to learn some procedures for superconducting experiments."

Xu You knew that some things should not be discussed in detail, so he avoided some key topics.

"Okay, okay, I won't say anything if you don't want to. Then watch carefully and ask me if you have any questions."

Yuan Dong also knew that it was not good for him to ask more questions. After joking with Xu You for a few words, he continued his experiment.

Xu You looked at Yuan Dong's operations and roughly saw what Yuan Dong was doing now.

"Senior, you are creating a low-temperature environment right now."

"Yes, for experiments like this, the temperature that needs to be reached is already close to absolute zero, so this kind of liquid helium device is needed. If the temperature requirement is not that low, above 77K, liquid nitrogen can be used."

Because most of the currently known superconductors can only achieve superconducting effects at very low temperatures.

Therefore, in superconducting experiments, the step of creating a low-temperature environment is inevitably inseparable.

"Xu You, look at this tank of liquid helium. It looks very inconspicuous, right? It costs several thousand yuan, but it can only maintain a low temperature for three or four days. Fortunately, our laboratory has a recycling system.

Helium can be recycled, otherwise the laboratory will be bankrupted by us sooner or later."

"Is it so expensive? I thought a few hundred yuan would be enough."

The prices of the consumables required for these laboratories are much higher than Xu You imagined.

And this is only part of the experimental cost.

By rough estimation, the scientific research funds consumed by a large laboratory in a year are really huge.

After completing the creation of the low-temperature environment, Yuan Dong began to prepare for measurements.

"Condensed matter physics sounds quite high-end. In fact, the content of the experiment is basically measuring resistance. Of course, it is not just about measuring resistance. You can add a magnetic field to measure resistance, lower the temperature to measure resistance, and add gate control.

Measure resistance, apply pressure to measure resistance. After these measurements are completed, change another material and continue measuring resistance."

Yuan Dong's statement sounds a bit negative.

But after Xu You thought about it, he was indeed speaking rudely but not rationally.

Although the properties studied in condensed matter are not just conductivity.

But conductivity is indeed one of the most commonly studied properties.

Xu You did not lose interest in the experiment because of Yuan Dong's words.

These principles sound very simple.

But in actual operation, there are still many skills and details involved.

Yuan Dong is not an ordinary person. Like Xu You, he was promoted to the Wu Jing National Team.

After my undergraduate degree, I successfully secured a graduate degree and was considered a very outstanding student at Jida.

After staying with Yuan Dong for a few days, Xu You learned a lot and basically mastered the process and operation methods of superconducting experiments.

On the other side, Xuzhou's speed was also much faster than expected.

The first batch of aluminum cluster materials has been produced and mailed to Qiaosen.

"Xu You, the first batch of aluminum cluster materials has arrived. You can start preparing for experiments. I will arrange for Yuan Dong to help you take care of it. If you have any questions, you can come to me directly."

"Okay, Teacher Qiao, I understand."

With the newly arrived materials, Xu You went to the laboratory and started measuring work.

"After working on it for a long time, it turns out that you are also here to measure the resistance."

Yuan Dong saw the content of Xu You's experiment, but did not know that it was actually a suspected superconducting material discovered by Xu You himself.

In fact, Yuan Dong couldn't guess it, which was very normal.

Generally speaking, the superconducting properties of superconducting materials are discovered during laboratory measurements, rather than being determined before measurement.

It is very rare for someone like Xu You to first predict superconductivity through theory and then measure it.

"Xu You, what materials are you going to test?"

"Aluminum, and some special aluminum." Xu You said truthfully.

"There is nothing measurable about aluminum. Someone has already studied it. Forget it, you can test yours. If you have any questions, call me and I will do my experiments first."

Yuan Dong is still very relieved about Xu You and basically doesn't need to take care of it himself.

It is much easier to lead than those undergraduates who are doing final projects in their senior year.

After that, the two of them conducted their own experiments.

As Xu You said, the first thing Xu You measured was ordinary bulk aluminum metal.

Although the superconducting properties of bulk aluminum have long been studied thoroughly.

But as a control experiment, it still has to be measured first.

Xu You followed the measurement steps taught by Yuan Dong before, first creating a low-temperature environment, and then measuring the resistance.

Sure enough, when the temperature was low enough, Xu You discovered a magical phenomenon.
Chapter completed!