Chapter 177 Imagination stronger than artificial intelligence
Except for 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 material seems to be more like an insulator?"
With so many experiences of complete conductivity measurements, Ning Chen was concerned about the changes in various data. , is also very sensitive.
Although it is possible for some insulators to transform into superconductors at extremely low temperatures, after all, this is a relatively rare situation, 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 judging from the current measurement data, 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 material is a very pure insulator."
After completing the measurement experiment of the complete conductivity of the material, Ning Chen still felt a little disappointed.
Such results 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?"
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 what he was doing at this time, and asked Xu Zhou curiously:
"Teacher Xu, you can tell from my expression whether my experiment is a success or not. Failed? "
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, I’ve known you for so long, I can still see this.”
Hearing what Xu Zhou said, Ning Chen also felt that many things came 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, you are only twenty-one now. "Ning Chen doesn't really want to become a person that others can't figure out. It's 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.
With no choice but to put this issue aside for the time being, Ning Chen first sorted out his previous research results and also took 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 be Applicable.”
Ning Chen still insists 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 before Similar problems have never occurred in various iron-based superconductor systems, so 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 train of thought, Ning Chen continued to make calculations 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."< br>
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%... Look 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 is 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.
This kind of difficult experimental operation is somewhat difficult to achieve by Ning Chen alone.
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 can call over."
Ning Chen I am not sure what problems I will 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?”
“You can’t say that, I can only say that now only my experiment uses this equipment. This equipment. But I believe that more and more people will use this equipment soon.”
(End of this chapter)