Chapter 435

In fact, Xiao Zheng's problem is not very difficult, at least not very difficult for Xu mang. When Xu saw this problem, the first theory came to his mind, that is, by controlling the lattice constant of graphene and the interaction between electrons, it is possible to realize the continuous change of graphene from metal to insulating state.

This is similar to its own three-layer graphene superconductor, but the core is a little different.

If the interaction between electrons is very strong, each electron is associated with other electrons, and the movement of one electron will be strongly constrained by other electrons. Therefore, the Coulomb interaction between conductive electrons in materials is greater than the kinetic energy of electrons, which will make the movement of electrons difficult.

In this way, the insulation state is formed.

In fact...

is a strongly correlated electron system in condensed matter physics theory, a system in which the interaction between electrons cannot be ignored.

"Alas..."

"this needs to be overturned and started again." Xu mang sighed helplessly, and quietly began to recalculate from the theory. At least, according to Xiao Zheng's requirements, the theoretical framework was established. Otherwise, it would be difficult for them to follow the road behind them.

"Idiot?"

"Whose call was it just now?" Looking at the menu, Yang Xiaoman asked curiously, "I seem to hear a woman's voice, which is quite gentle... Do you need to explain it to me?"

"I am a student."

"I arranged to work in the Institute of materials and technology of the Academy of Sciences." "This research institute is toxic... Because of the problem of research progress, the research funds have been cut off again, and I have no choice but to come to me," Xu said without expression

Yang Xiaoman nodded and seriously said: "since it's your student, you should help, and you push people into the fire pit. It's too much not to help."

"I know..."

"this is not helping to build a theoretical framework." "I won't go to bed at night," Xu said. "You can go to bed alone."

"Ah?"

"I..." Yang Xiaoman was very uncomfortable, she felt that she had dug a big hole for herself, but she said helplessly, "help is help, but you still need to sleep, and your body is important."

At this time,

Xu mang didn't pay any attention to Xiaoman. He just made a model of graphene in front of the computer. In fact, it was copied from his three-layer graphene paper, because the bottom of the three-layer graphene band is very flat, which means that the electron has a great effective mass.

At the same time,

at the same time,

Xu mang still chose boron nitride, which is composed of nitrogen and boron atoms. However, in the process of design control, Xu mang adopted a different concept from superconductivity, in which the interaction strength of electrons in graphene system was controlled in situ by two voltage energies, so that the effective mass of electrons became larger.

In this way,

can realize the transition of graphene from metallic conductor to insulating conductor, which only needs to be switched on and off, and it is still at room temperature instead of a few Kelvin.

Of course,

Xu mang would not give Xiaozheng several people such a detailed process. He could only give a core theory, that is, a general framework. Under this theoretical framework, let Xiaozheng Jiren complete it by themselves. If everything is done, he will study a ghost.

Calculation...

it's time to calculate again.

After the design of the theory, the next step is endless calculation. This calculation process is Xu Mang's most hated Hamiltonian operator, which is composed of pure points, absolute continuity and singularity. It is one of the concepts of quantum mechanics that people hate and despair, but it can't be used. After all, Hamiltonian operators can calculate the time evolution of quantum states.

What to do?

We need to find a tool man.

At this time,

Xu mang saw Yang Xiaoman, who was studying recipes. Although Xiaoman didn't know physics very well, she was very good at mathematics. She only needed to teach her to understand it. Would you like to... Cheat?

"Wife!" Xu mang called out.

In an instant,

Yang Xiaoman's soul has been sublimated. This is the first time that Xiaoman is called his wife by Xu mang. Generally speaking, he is only called "dear", and dear is the limit of the limit. Who would have thought that he would be called wife...

"husband ~" Yang Xiaoman flew into Xu Mang's arms, his hands like cat's paws, slightly bending his joints and looking lucky Fudi sent a whine: "love you, love you

Hearing this,

Xu Mang's scalp was numb.

However, he knows a truth. Even if Yang Xiaoman is such a domineering girl, there is still a cute side hidden in her, but this hidden attribute is too difficult to trigger.

With a strong sense of discomfort, Xu mang said with a smile: "I... I have something to do, can you help me calculate it?"

"Yes, husband." Yang Xiaoman nodded and said with a smile, "wife, I will help you finish it with your heart."

"Ha ha..."

"MMM!"

Xu mang smiles and nods.A few minutes later,

Yang Xiaoman, sitting at the table, was yelling angrily with his mobile phone: "Xu mang! I'll come back to you! I will kill you

...

when Xiao Zheng came back to the laboratory, two colleagues came up to him in a hurry. Looking at their tense expressions, Xiao Zheng nodded and said earnestly, "Professor Xu has agreed to our request, and he will help us establish a theoretical system."

"Really?"

"That would be wonderful!" A boy excitedly said, "when will Professor Xu help us to solve this problem? How many days will it take? "

Before Xiao Zheng opened his mouth,

another boy said, "it will take at least four or five days. Although Professor Xu is our God, he is only the God of human beings and flesh and blood. What do you think of Superman

"I..."

"wait!" The boy interrupted Xiao Zheng again and said seriously, "Superman is a ball. Professor Xu is Batman. He beat Superman with his flesh and blood."

"You fart

"You fart

Xiao Zheng has some embarrassment. Originally, he was talking about business, but he suddenly got involved in it. Is there a superhero dream in every boy's heart? And this dream is regardless of size, age and status.

These two are postdoctors!

Crazy?

"Hello, Hello, Hello!"

"You are postdoctoral students." Xiao Zheng said with a black face: "can't you be so naive? Superman and Batman are fierce, and not the author has the final say.

"..."

"..."

"..."

"I tell you... Professor Xu will solve it for us tomorrow morning." Xiao Zheng said solemnly.

The two boys looked at Xiao Zheng in horror.

"Yes

"No mistake." "Professor Xu said it himself," Xiao Zheng explained

Can't you?

It's a little too fast, but... Think about it, it's really slow.

Question?

I'm sorry... It's impossible for several people to question Xu mang. Xu Mang's status in the three people's minds is very high, almost the kind of omnipotent God.

With the progress of graphene stagnated, Xiao Zheng took charge of the work of guiding the postgraduate students. However, they were soon called away temporarily. They needed to attend a meeting to discuss the funding of graphene and to divide the funds that could be cut.

In a small conference room, there are only a few people, including Cao Junhui and Wang Xiong, as well as three leaders from other departments. These three people are the beneficiaries and the main force in cutting down graphene funds.

"Cao Suo..."

"can we postpone it for a few more days?" Xiao Zheng said helplessly, "we will make progress soon."

"I said Xiao Zheng?"

"Have you all been nearly a month?" The head of a certain department said seriously, "there has been no progress in this month. When the funds are to be cut off, suddenly they say that progress has been made. Do you think I will believe it?"

Indeed,

according to the current situation, there is a suspicion of fraud, but it can be understood that anyone who has been cut off funding can't stand it. In addition, Xiao Zheng has just come to work in the Institute of materials technology of CAS. Although he is the head of graphene research laboratory, he is a little unqualified compared with the big guys here.

No matter in terms of age, status, and achievements, Xiao Zheng is the most miserable person in charge.

In fact, the three people know that they will encounter such a situation. After all, doing research in school is different from doing research outside. In school, there is a natural protective layer, while outside, it is a real direct action. They will never leave a little affection.

At this time,

Xiao Zheng was helpless. If Professor Xu was sitting beside him today, who would dare to say something about cutting down funds? It is Professor Xu's conscience discovery that they did not withdraw their funds.

"Give us three more days."

"In three days, we will be able to provide a satisfactory response for all." Xiao Zheng said solemnly, "Cao Suo... That's what I mean."

"Good."

"I'll see it in three days." Cao Junhui nodded and said to the other three people in charge: "after waiting for so many days, there is no problem waiting for another three days?"

The three leaders nodded helplessly.

At the end of the meeting,

Xiao Zheng and others returned to the laboratory with a trace of anger. It was a normal phenomenon to crack down on new employees in the workplace. However, those who had not been suppressed like this were still lack of strength, seniority and confidence in the face of old employees.

However...

it is also different from person to person. If Professor Xu works here, he may be able to do whatever he wants, regardless of the origin of the other party.

"Ah?"

"Is this... Completed in three days, or through Professor Xu's theory, we will complete it ourselves?" A boy asked.Xiao Zheng said: "Professor Xu gives us a theoretical framework. We can think about it by ourselves. This is what I ask for. If Professor Xu helps us complete it, then we have no value of existence."

...

at night,

just arrived,

Xu mang returned to his apartment with a takeout. As soon as he opened the door, he saw Yang Xiaoman sitting on a chair. His originally happy smile suddenly turned sunny into Yin because of Xu Mang's intrusion.

"Hum!"

"Do you have the courage to come back?" Yang Xiaoman glared at Xu Mang and said indignantly, "you use sweet words to use me every time."

"..."

"how can we say that we can use it?" Xu mang helplessly said: "this is called mutual harm."

"Go away!"

"I'll never be cheated again, you shameless bastard!" Yang Xiaoman said angrily: "Love Cheater... I hate you!"

Xu mang grinned awkwardly. After putting down the takeaway, he quietly walked up to her, hugged her waist, leaned to his ear and said softly, "well, what's the result of the calculation? Is it correct? "

"Of course Although Yang Xiaoman has a tough mouth, he is quite honest. He naturally leans on Xu Mang's arms and says with a greasy and crooked voice, "do you want to go to the furniture store tomorrow? You're a stiff bed, and you're a crazy cow. I'm all over the place when I get up in the morning. "

"Oh..."

I had no sleep all night,

it was nine o'clock in the morning.

Xu Mang, who is still in his sleep, is awakened by the song of "poultry you are too beautiful".

"Hello?"

"Professor Xu... You... Did you send it?" Xiao Zheng asked carefully.

"Oh Xu mang suddenly woke up and said, "I forgot... I'm just...

" ah! "

All of a sudden,

Yang Xiaoman called out and said angrily, "be gentle... It's pressing on my hair!"

"..."

"..."

the scene once fell into embarrassment.

"Yes..."

"sorry to disturb Professor Xu."

......

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