Xiao Zheng's problem is actually not very difficult, at least not very difficult for Xu Mang, when Xu Mang saw this problem, the first theory that came to his mind was that by controlling the lattice constant of graphene and the interaction between electrons, it is possible to achieve a continuous change of graphene from metal to insulating state.

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

If the interaction between electrons is strong, each electron is associated with the other electrons, and the movement of one electron is strongly constrained by the other electrons, so the Coulomb interaction between the conductive electrons in the material is greater than the kinetic energy of the electrons, which makes the movement of electrons difficult.

In this way, an insulating state is formed.

In fact...

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

"Ugh..."

"It's going to have to be torn down and restarted. Xu Mang sighed helplessly, and silently started to recalculate from the theory, at least according to Xiao Zheng's requirements, to establish this theoretical framework, otherwise it would be difficult for them to walk the road ahead.

"Stupid?"

"Whose call was it just now?" Yang Xiaoman flipped through the recipe and asked curiously: "I seem to hear a woman's voice, and the voice is quite gentle... Do you need to explain this to me?"

"I'm a student. ”

"I arranged to work at the Institute of Materials Technology of the Chinese Academy of Sciences. Xu Mang said expressionlessly: "This research institute is toxic... Because of the progress of the research, the research funds were cut again, and I came to me in desperation. ”

Yang Xiaoman nodded and said seriously: "Since you are your student, you have to help, and you pushed others into the fire pit, so it's a bit too much not to help." ”

"I see..."

"Isn't this helping to establish a theoretical framework? Xu Mang said: "I won't go to bed at night, you can sleep by yourself first." ”

"Huh?"

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

At this point,

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

meantime

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

In this way,

The transformation of graphene from a metallic conductor to an insulating conductor is realized, and it only needs to be switched and at room temperature, not a few Kelvin temperatures.

Of course

Xu Mang will not give Xiao Zheng and the others such a detailed process, he can only give a core theory, that is, a general framework, under this theoretical framework, let Xiao Zheng and the others complete it by themselves, if everything is done, they will study a ghost.

Compute...

Finally, it's time to calculate again.

When the theory is designed, 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 continuities and singularities, one of the hated and desperate concepts of quantum mechanics, 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.

Then

Xu Mang saw Yang Xiaoman who was studying the recipe, although Xiaoman didn't know much about physics, but her math was very good, she only needed to teach it to understand, or... Flicker?

"Wife!" Xu Mang shouted.

moment

Yang Xiaoman's soul has been sublimated, this is the first time Xiaoman has been called his wife by Xu Mang, usually he is just called dear, and dear is already the limit of the limit, who would have thought that today he would suddenly be called his wife...

"Husband~" Yang Xiaoman flew into Xu Mang's arms, his hands were like cat's claws, slightly bending his joints, and he sighed happily: "Love you, love you!"

Hearing this,

Xu Mang's scalp was tingling.

But he understands a truth, even if it is a domineering girl like Yang Xiaoman, there is still a cute side hidden in the depths, but this hidden attribute is too difficult to trigger.

Holding back the discomfort, Xu Mang said with a smile: "I... I have something to do, can you do the math for me?"

"Okay, husband. Yang Xiaoman nodded and said with a smile: "Wife, I will definitely help you finish it with your heart." ”

"Hehe..."

"Hmm!"

Xu Mang smiled and nodded.

A few minutes later,

Yang Xiaoman, who was sitting at the table, was holding his mobile phone and roaring angrily: "Xu Mang! You give the old lady a special way to come back! I'm going to kill you!"

...

When Xiao Zheng returned to the laboratory, the two colleagues hurriedly stepped forward, looking at the nervous expressions of the two, Xiao Zheng nodded, and said seriously: "Professor Xu agreed to our request, and he will help us establish a theoretical system." ”

"Really?"

"That's great!" said a boy excitedly, "When will Professor Xu help us get it?"

didn't wait for Xiao Zheng to speak,

Another boy said: "It will take at least four or five days, although Professor Xu is a god in our minds, but he is only a god in the world, a body of flesh and blood, do you think he is superhuman?"

"I..."

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

"You fart!"

"You're a fart!"

Xiao Zheng was a little embarrassed, he was talking about business, but suddenly he got to it, does every boy have a superhero dream in his heart?

These two are postdocs!

Crazy, right?

"Hey, hey, hey!"

"You're a postdoc!" Xiao Zheng said with a dark face: "Can you not be so naïve? Who is better than Superman and Batman, it is not the author's final say." ”

“...”

“...”

"I'm telling you... Professor Xu will be able to get rid of it for us tomorrow morning. Xiao Zheng said solemnly.

Words fall,

The two boys looked at Xiao Zheng in horror.

"Yes!"

"There's nothing wrong with that. Xiao Zheng explained: "This is what Professor Xu said personally. ”

No way?

It's a little too fast, but... If you think about it, it's really ridiculous.

Oppugn?

I'm sorry... It is 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 the kind of omnipotent god.

When the progress of graphene stalled, Xiao Zheng and the three were responsible for guiding the master's students, but soon the three were temporarily called away, and they needed to attend a meeting on the issue of graphene funding, and what funds they needed to divide could be cut.

Small conference room,

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

"Caoso..."

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

"I said Xiao Zheng?"

"It's been almost a month since you guys, right?" said the head of a certain department solemnly: "There has been no progress in this month, and when it is time to cut funds, all of a sudden it is said that there is progress, do you think I will believe it?"

truly

Judging from the current situation, there is a little suspicion of fraud, but it is understandable that whoever is cut off the funds can't bear it, plus Xiao Zheng has just come to work at the Institute of Materials Technology of the Academy of Sciences, although he is the head of the graphene research laboratory, but compared with the big guy here, he is a little unqualified.

Regardless of age, status, and achievements, Xiao Zheng is the worst of the many responsible persons.

In fact, the three of them knew that they would encounter such a situation, after all, doing research in school is different from doing it outside, there is a natural protective layer in school, and on the outside, it is a real knife and a real gun to do it directly, and there will definitely be no mercy.

At this point,

Xiao Zheng was very helpless, if Professor Xu sat next to him today, who of these people would dare to mention the matter of cutting funds? Not revoking their funds was considered a discovery of Professor Xu's conscience.

"Give us three more days. ”

"After three days, we were able to provide a satisfactory answer to everyone. Xiao Zheng said solemnly: "Cao Suo... That's what I mean. ”

"Good. ”

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

The three responsible persons nodded helplessly.

When the meeting ends,

Xiao Zheng and others returned to the laboratory with a trace of anger, it is normal for newcomers to be suppressed in the workplace, but they have never seen such suppression, in the final analysis, they are still not strong enough, their qualifications are not old enough, and they lack confidence in the face of those old employees.

But...

It also varies from person to person, if Professor Xu works here, it is estimated that he will be able to do whatever he wants, regardless of the other party's origins, and then talk about it.

"Huh?"

"This... Will it be all done in three days, or will we do it ourselves through Professor Xu's theory?" asked one boy.

Xiao Zheng said: "Professor Xu gave a theoretical framework, and we pondered it ourselves under the theoretical framework here, which is my own request, if Professor Xu has helped us complete it, then we have no value in existence." ”

...

night

Just coming,

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

"Humph!"

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

“...”

"How can this be said to be used?" Xu Mang said helplessly: "This is called mutual harm." ”

"Get out!"

"I won't be fooled again in the future, you shameless bastard!" Yang Xiaoman said angrily: "Love liar... I hate you to death, old lady!"

Xu Mang smiled awkwardly, and after putting down the takeaway, he quietly walked towards her, hugged her waist, leaned into her ear, and said softly: "Say... How's the calculation going? Is it correct?"

"Of course!" Although Yang Xiaoman was very tough in his mouth, his body was quite honest, and he naturally leaned on Xu Mang's arms, and said greasy and crookedly: "Anyway, will you go to the furniture store tomorrow? Every time I wake up in the morning, it's like I'm falling apart. ”

"Oh..."

A sleepless night,

It's nine o'clock in the morning.

Xu Mang, who was still asleep, was woken up by the song of "Fowl, You Are Too Beautiful".

"Hello?"

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

"Oops!" Xu Mang suddenly came to his senses and said embarrassedly, "I forgot... I'm just..."

"Ahh

suddenly

Yang Xiaoman shouted, and said angrily: "Lighter... It's going to hit my hair!"

“...”

“...”

The scene was awkward for a while.

"Yes..."

"Sorry Professor Xu, excuse me. ”

......