Xiao Zheng's question is actually not very difficult, at least it is not difficult for Xu Mang. When Xu Mang saw this question, the first theory that came to his mind was to control the lattice constants and electrons of graphene.

By interacting with each other, it is possible to realize the continuous change of graphene from a metallic to an 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 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 the material is greater than the kinetic energy of the electrons, which will cause

The movement of electrons becomes difficult.

This forms an insulating state.

actually

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

"well"

"This needs to be overthrown and started over." Xu Mang sighed helplessly and silently started to recalculate from the theory. At least the theoretical framework was established in accordance with Xiao Zheng's requirements, otherwise it would be difficult for them to follow the road ahead.

"Fool?"

"Who called just now?" Yang Xiaoman flipped through the menu and asked curiously: "I think I heard a woman's voice. The voice was quite gentle. Do you need to explain it to me?"

"My student."

"I arranged to work at the Institute of Materials Technology of the Academy of Sciences." Xu Mang said expressionlessly: "This institute is toxic because of problems with research progress, and scientific research funding has been cut. You came to me when you were desperate."

Yang Xiaoman nodded and said seriously: "Since I am your student, I have to help, and it is you who pushed others into the fire pit. Not helping is a bit too much."

"I see"

"Isn't this helping to establish a theoretical framework?" Xu Mang said, "I won't go to bed tonight, so you can go to bed alone first."

"ah?"

"I" Yang Xiaoman felt very uncomfortable. She felt that she had dug a big hole for herself, and said helplessly: "Help is help, but you still need to sleep. Your health is important."

at this time,

Xu Mang ignored Xiaoman and just made a graphene model in front of the computer. In fact, it was copied from his three-layer graphene paper, because the bottom of the energy band of three-layer graphene is very flat, which means that electrons have

Great effective mass.

at the same time,

Xu Mang still chose boron nitride, a material composed of nitrogen atoms and boron atoms. However, during the design control process, Xu Mang adopted a different concept from superconductivity, using two voltages to control the graphene system in situ.

The strength of the electron interaction in the electron makes the effective mass of the electron larger.

In this way,

This realizes the transformation of graphene from a metallic conductor to an insulating conductor, just by pressing the switch, and it is still at normal temperature, not at a temperature of several Kelvin.

certainly,

Xu Mang will not give Xiao Zheng and others such a detailed process. He can only give a core theory, which is a rough framework. Within this theoretical framework, let Xiao Zheng and others complete it by themselves. If everything is done,

Still studying a ghost.

calculate

Finally it’s time to calculate again.

After designing the theory, the next step is endless calculations, and this calculation process is Xu Mang's most hated Hamiltonian operator, which is composed of pure points, absolute continuity and singular points. It is one of the most hated and despairing concepts of quantum mechanics.

One, but it cannot be used. After all, the Hamiltonian operator can calculate the time evolution of quantum states.

what to do?

I need to find a tool man.

At this time,

Xu Mang saw Yang Xiaoman who was studying the recipe. Although Xiaoman didn't know much about physics, she was very good at mathematics. She only needed to be taught to understand it. How about fooling her?

"Wife!" Xu Mang shouted.

moment,

Yang Xiaoman's soul has been sublimated. This is the first time that Xiaoman is called his wife by Xu Mang. Normally, he is just called dear, but dear is already the limit of the limit. Who would have thought that he would suddenly be called wife today?

Wife

"Husband~" Yang Xiaoman flew into Xu Mang's arms, her hands were like cat's paws, her joints were slightly bent, and her face was whimpering happily: "I love you, I love you!"

Hearing these words,

Xu Mang's scalp was numb.

But he understands one thing. Even a domineering girl like Yang Xiaoman still has a cute side hidden deep inside, but this hidden attribute is too difficult to trigger.

Holding back the discomfort, Xu Mang said with a smile: "I have something to do, can you help me figure it out?"

"Okay, hubby." Yang Xiaoman nodded and said with a smile: "Honey, I will help you finish it carefully."

"hehe"

"Um!"

Xu Mang smiled and nodded.

After a few minutes,

Yang Xiaoman, who was sitting in front of the table, was shouting angrily with his cell phone: "Xu Mang! Why don't you come back to me! I'm going to kill you!"

When Xiao Zheng returned to the laboratory, two colleagues hurriedly came forward. Looking at their nervous expressions, Xiao Zheng nodded and said seriously: "Professor Xu agreed to our request, and he will help us establish a theory."

Systematic.”

"real?"

"That's great!" A boy said excitedly: "When will Professor Xu help us get it done? How many days will it take?"

Before Xiao Zheng could speak,

Another boy said: "It will take at least four or five days. Although Professor Xu is a god in our minds, he is only a human god with flesh and blood. Who do you think is Superman?"

"I"

"Wait!" The boy interrupted Xiao Zheng again and said seriously: "Superman is just a ball. Professor Xu is Batman, and he beats Superman with his flesh and blood."

"You fart!"

"You're the one farting!"

Xiao Zheng was a little embarrassed. He was just talking about business, but suddenly he got involved in this topic. Does every boy have a superhero dream in his heart? And this dream does not matter whether he is big or small, young or old.

status.

These two are postdoctoral fellows!

Crazy?

"Hey hey hey!"

"You are postdocs!" Xiao Zheng said with a dark face: "Can you stop being so naive? It's not up to the author to decide who is more powerful, Superman or Batman."

""

""

"I told you that Professor Xu can solve it for us tomorrow morning." Xiao Zheng said seriously.

The words fell,

The two boys looked at Xiao Zheng in horror.

"right!"

"That's right." Xiao Zheng explained: "This is what Professor Xu said himself."

No way?

This is a bit too fast, but if you think about it carefully, this is indeed very Xu Mang.

question?

Sorry, it's impossible for a few people to question Xu Mang. Xu Mang's status in the minds of the three of them is very high, almost like an omnipotent god.

When the progress of graphene stagnated, Xiao Zheng and the other three took charge of supervising master's students. However, the three of them were soon called away temporarily. They needed to attend a meeting about the issue of graphene funding and what funds they needed to divide.

Can be cut.

Small conference room,

There are only a few people, except Cao Junhui and Wang Xiong, and there are three leaders from other departments. These three people are the beneficiaries and the main force in cutting off graphene funding.

"Cao Suo"

"Can you postpone it for a few more days?" Xiao Zheng said helplessly: "We will make progress soon."

"Did I say Xiao Zheng?"

"It's been almost a month, right?" The head of a certain department said seriously: "There has been no progress in this month. When the funds were about to be cut, they suddenly said there was progress. What do you think?
To be continued...