Start as a top student and move towards the stars and the sea

Apart from being more vigilant about the toxicity of elements, other operations are not much different from before.

In a few days, Ning Chen successfully synthesized many FeAs films, and finally successfully synthesized the iron-based compound he designed.

After testing, Ning Chen determined that the structure of this substance was exactly the same as the substance he had designed before.

Things seemed to be developing in the ideal direction again, but during the process of measuring the complete conductivity of this substance, Ning Chen discovered something was wrong.

"No... Judging from the current trend, this substance seems to be more like an insulator?"

With so many experiences of complete conductivity measurements, Ning Chen is also very sensitive to changes in various data.

Although it is possible for some insulators to transform into superconductors at extremely low temperatures, this is a relatively rare situation after all, and there are some complex transformation mechanisms involved.

When Ning Chen designed this material, he did not consider the transition between insulators and superconductors. Therefore, at least from the measurement data obtained now, Ning Chen's model is not accurate enough.

However, Ning Chen did not end the measurement immediately, but continued the measurement work.

In the end, until Ning Chen lowered the temperature of the test circuit to infinitely close to 0K, he still did not find any superconducting transition.

"Sure enough, this substance is a very pure insulator."

After completing the measurement experiment of the complete conductivity of matter, Ning Chen still felt a little disappointed.

Such a result made Ning Chen realize that he still has a lot of room for improvement.

Of course, experimental failure is a very normal thing in the process of scientific research.

Ning Chen quickly adjusted his mentality and returned to the laboratory, preparing to summarize and analyze the experimental data just measured to find the core problem.

After Ning Chen returned to the laboratory, Xu Zhou could tell from Ning Chen's demeanor that Ning Chen's experiment had probably failed.

"Ning Chen, did this experiment not go so well?"

After hearing Xu Zhou's words, Ning Chen nodded and said:

"Well, after testing, this material is just an insulator and does not show a transition to a superconducting state at any temperature."

"It doesn't matter. This is also a normal phenomenon. Don't be discouraged. Just analyze the reasons." Xu Zhou comforted.

Ning Chen finally realized something at this time and asked Xu Zhou curiously:

"Teacher Xu, can you tell from my expression whether my experiment was a success or a failure?"

Ning Chen has always felt that he is not a person who expresses happiness and anger on his face and can better hide his inner emotions.

"Of course, after knowing you for so long, I can still see this."

Hearing what Xu Zhou said, Ning Chen also felt that many things come from the heart. Without deliberately covering up, it can indeed be observed from some details.

"It seems that I haven't practiced enough. I will try not to let you see everything in the future." Ning Chen said with a smile.

"Forget it, it would be terrible if I were with you every day and couldn't even see your emotions. You are already mature enough now, and you are only twenty-one years old."

Ning Chen didn't really want to make himself a person that others couldn't figure out. It was good to maintain this natural and relaxed state when getting along with friends.

…

Ning Chen spent a few days analyzing the experimental data, and used Xiaozhi to help find the reason for the failure of the experiment.

What made Ning Chen a little disappointed was that neither he nor Xiaozhi found any problems in this model, but the results of the experiment were contrary to the theory they believed.

In desperation, Ning Chen had to put this issue aside for the time being, sort out his previous research results, and also take time to study the issues related to the Navier-Stokes equation.

Whenever Ning Chen's research reaches a bottleneck, it is a good choice to divert his attention.

After studying the Navier-Stokes equation for a few days, although Ning Chen has not thought of any ideas to solve its existence and smoothness, his experience in mathematics has improved a bit.

After feeling that his thinking had broadened, Ning Chen re-researched the "1144" new iron-based superconductor he designed.

Ning Chen definitely couldn't put this issue aside forever, otherwise Ning Chen would always feel like there was a stone pressing on his heart.

After thinking for a while, Ning Chen suddenly remembered what Ren Mingshan said when he was at Yan University.

"Teacher Ren once said that some topological insulators may be transformed into topological superconductors after very simple modifications. Although this material is not a topological insulator, a similar principle may also apply."

Ning Chen still stubbornly believes that there is nothing wrong with his design idea in general, but some details need to be fine-tuned.

Thinking of this, Ning Chen made a detailed comparison between the "1144" iron-based superconductor he designed and various other conventional iron-based superconductors, trying to find out the problem.

Time passed minute by minute, and at this moment, Ning Chen suddenly figured out something.

"No... there is a problem with the bond distance! The bond distance of the '1144' type iron-based superconductor should not be exactly the same as that of iron-based superconductors of other systems."

Because similar problems have never occurred in various iron-based superconductor systems before, Ning Chen and Xiaozhi have not considered this direction before.

As an artificial intelligence model, Xiaozhi relies more on existing knowledge for learning, and its ability to innovate relies heavily on big data.

But humans are different. They have richer imaginations and can show more powerful innovation capabilities than artificial intelligence when data is limited.

Following this line of thinking, Ning Chen continued to calculate and found the problem.

"If the bond distance is still the same, the tetrahedral structure of Fe and As will be distorted, thus affecting the superconductivity of the material. It seems that the bond distance needs to be adjusted."

After finding the possible reason, Ning Chen adjusted the model and tried to make the bond distance between Fe and As appropriate.

After some adjustments and calculations, Ning Chen was finally satisfied with the adjusted model.

In order to further determine the level of his model, Ning Chen copied the model into the computer again and asked Xiaozhi to evaluate the new model.

After the evaluation was completed, Ning Chen looked at the evaluation data on the screen and said to himself in surprise:

"The probability of complete conductivity this time has actually reached 95%... It seems that there should be no problem with this adjustment direction."

And this time, Xiaozhi's prediction of the superconducting critical temperature of this material was finally not blank.

Although according to Xiaozhi's prediction, the superconducting critical temperature of this material is only about 30K, as a brand-new system, this is already a very valuable research result.

However, what makes Ning Chen feel a little troublesome is that after the material structure is adjusted, new substances are not particularly easy to synthesize.

Because after adjustment, the position of Fe atoms is slightly deviated from normal, which will be a very big test for the molecular beam epitaxy film making process.

It is somewhat difficult for Ning Chen to accomplish such a difficult experimental operation by himself.

In desperation, Ning Chen had no choice but to ask Xu Zhou for help.

"Do you need me to help you with the experiment? Of course, no problem."

Ning Chen usually rarely takes the initiative to ask others for help. Xu Zhou knew that Ning Chen must have encountered some difficulties in this experiment.

"Am I enough to help by myself? Do you need to call Sui Feng over?"

"Well, it would be better if you could call him over."

Ning Chen was not sure what problems he would encounter in future experiments. The more people, the better.

Xu Zhou said hello and called Sui Feng over who was doing experiments.

Ning Chen brought Xu Zhou and Sui Feng to the MBE laboratory.

Neither Xu Zhou nor Sui Feng had seen MBE equipment before, and they were a little curious about this equipment.

"Ning Chen, is this the experimental equipment customized by Shengzhou University just for you?"

"I can't say that. I can only say that this equipment is currently used in my experiments. But I believe that more and more people will use this equipment in the near future."