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

Next, what Ning Chen needs to do is to plate these FeSe single atomic layer films on the SrTiO3 substrate.

This operation sounds simple, but in actual operation, it is completely different from simple electroplating.

Because the FeSe single atomic layer film is really very thin, seemingly thin objects such as "cicada wings" and "vellus hair" are millions of times thicker than the FeSe single atomic layer film.

For such a thin object, it is necessary to be very precise during the operation, otherwise not only will the coating process not be completed, but the atomic layer film and substrate will even be damaged.

After the experiment of coating processing began, Ning Chen experienced many failures. It was not until the experiment lasted for a week that Ning Chen finally successfully processed the material he wanted for the first time.

After various tests such as XRD and scanning electron microscopy, Ning Chen determined that this was the new iron-based superconductor he had previously dreamed of.

The next step was the experiment that Ning Chen had been waiting for for a long time, to measure the complete conductivity of this substance.

For this experiment, Ning Chen has become almost proficient in it.

Despite this, Ning Chen was very cautious during the experiment and maintained a high degree of concentration at all times.

When the temperature of the test circuit dropped to 80K, Ning Chen slowed down the temperature reduction and carefully observed the changes in various test data.

When the temperature continues to drop to 70K, the resistance temperature in the circuit begins to change dramatically.

"We have entered the superconducting transition temperature zone!"

Ning Chen continued to slow down the temperature reduction, hoping that he could more accurately measure the superconducting critical temperature of this material.

Ning Chen's eyes jumped back and forth between various test data. Finally, when the ambient temperature dropped to 65K, the resistance value of the test material had dropped below the highest resistance value required by superconductors.

"The critical temperature of superconducting is 65K! It is 5K higher than I previously predicted!"

After learning this result, Ning Chen's excitement was beyond words.

The superconducting critical temperature of 65K is still within the error of Ning Chen’s estimate, which means that Ning Chen’s previous prediction model was relatively accurate.

And this superconducting critical temperature has once again refreshed the superconducting critical temperature record for iron-based superconductors!

At this time, Ning Chen also felt a little lucky.

Fortunately, the superconducting critical temperature error this time is a little higher. If it were a few K lower, it might not be able to break the previous record.

After gradually calming down, Ning Chen continued to measure other properties of this substance.

Because it is only a complete conductor, it cannot be strictly determined to be a superconductor.

Fortunately, after a series of subsequent tests, this material also met the properties of complete diamagnetism and flux quantization.

At this time, Ning Chen could finally say with confidence that he had discovered an iron-based superconductor with a new high superconducting critical temperature!

After completing all these measurement experiments, Ning Chen informed Xu Zhou of the news.

After learning the news, Xu Zhou was also very happy for Ning Chen.

"This trip to Yanda is not in vain. In less than a month since you came back, you have improved the record of iron-based superconductors by 10K. When I have the opportunity, I will also apply and see if I can go to Shuimu or Yanda. Study further." Xu Zhou said with a smile.

"Mr. Xu, to be honest, if you have the opportunity, you can really apply to the college or college. I heard from my seniors in the School of Science before that teachers from their college will study outside in batches."

As a student, it is definitely inappropriate to talk to a teacher like this. However, the relationship between Ning Chen and Xu Zhou is no more like an ordinary teacher and student, but more like colleagues doing scientific research together. Ning Chen will talk about everything in front of Xu Zhou.

"Okay, I'll talk to Dean Liu about this first when I have a chance. But as a teacher, it's definitely not as convenient as you students. We still have scientific research and teaching tasks, so we have to arrange our time at least a few months in advance. The learning time doesn’t last particularly long either.”

It is definitely not realistic for someone like Ning Chen to directly study at Yanda for more than one semester.

"By the way, Ning Chen, didn't you say you wanted to buy a car before? Do you want to buy it now?"

After hearing Xu Zhou mention this matter, Ning Chen also remembered that he hadn't bought his car yet.

Originally, Ning Chen had made an appointment with Xu Zhou to go see the car together, but because the exchange study at Yanda had just been decided, Ning Chen had no intention of going to see the car in order to prepare for going to Yanda.

Ning Chen's time is not so tight now, so it is better to decide on the car purchase as soon as possible.

"Of course I'll buy it, then let's go this weekend."

"Okay, I just want to see if there are any suitable models. When the contract with Piati is officially signed, I might want to buy a new car."

Although Xuzhou's previous car had not been driven for a few years, after signing such a big contract, Xuzhou also wanted to change to a better car and enjoy it.

"Ning Chen, do you have an idea about what kind of car you want to buy?"

When it comes to the choice of car model, the first thing Ning Chen has to consider is whether to choose an electric car or a gas car.

Ning Chen had never driven a tram in her last life. Speaking of which, Ning Chen really wanted to buy a tram and drive it.

Because of the cooperation with Piati, if you buy a tram, you can better understand the situation of the tram, which will also be helpful for subsequent research.

However, thinking about the shortcomings of the tram, Ning Chen decided to push back the idea of ​​buying a tram.

"The trams in Piati are really developing well now, so... I want to buy a petrol trolley first."

Hearing Ning Chen's somewhat weird speech, Xu Zhou couldn't help but smile and said:

"Yes, I also suggest that you buy a gas car first. It's not that trams are bad, because you definitely don't drive a lot, so it's more appropriate to buy a gas car."

Now that he has chosen an oil truck, Ning Chen will definitely not put Piati on his candidate list again.

On Saturday, Ning Chen and Xu Zhou visited several 4S stores together.

In the end, Ning Chen chose a black Passat and paid the full amount with his card. With the help of the 4S store staff, he completed all the procedures on the same day.

Ning Chen feels that this kind of mid-range car is very suitable for him now. The power, comfort and safety of this car are very good, and at the same time it does not look luxurious.

After picking up the car, Ning Chen sat in the driver's seat, and Xu Zhou sat in the passenger seat.

"Ning Chen, if you are not confident in your driving skills, I can help you drive back first."

At this time, Xuzhou felt a little nervous. After all, Ning Chen was a player who had just obtained his driver's license. This should be the first time Ning Chen officially drove on the road after obtaining his driver's license.

"Teacher Xu, don't worry. Although it hasn't been long since I got my driver's license, I am already an experienced driver."

Ning Chenxin said that taking into account his driving experience in his previous life, his driving experience must be much longer than that of Xu Zhou.

I saw that Ning Chen skillfully put on his seat belt, stepped on the brakes, turned on the engine, and shifted into gear. The whole set of actions was done in one go, without the mechanical and jerky feeling of a novice who had just started on the road.

After the vehicle started, Xu Zhou felt that Ning Chen's car was driving very smoothly, and looking at the way Ning Chen drove the vehicle, it was indeed very relaxed and skillful.