Chapter 428

Looking at Yang Xiaoman is skillfully operating the equipment, Xu mang thinks that bringing Xiaoman here this time is almost one of the most wise decisions he has ever made in his life. However, there is a reason for Xiaoman's proficiency. In the past six months, she has skillfully controlled the gear handle!

Say oneself also do not strive for success, unexpectedly was a short flat to grasp the lifeline, simply... It is a great shame!

"Alas

"There are three kinds of stacked data of AAA, ABA and ABC. Come and have a look at it yourself." Yang Xiaoman called Xu mang on the edge, and looked at his eyes, staring at himself. He couldn't help but burst into red clouds and said shyly, "what's the matter?"

"Nothing..."

Xu mang regained consciousness and walked awkwardly to Xiaoman. He didn't dare to say what he was thinking. He would be beaten by fat if he said it.

"Is this the spatial distribution of Fermi energy intensity integral from 0.1 to 0.5EV?" Xu mang asked curiously, "why doesn't it look different? Are you mistaken?"

"No way!"

"I'm serious." Yang Xiaoman said firmly: "if I'm wrong, I'll let you hit my ass at night. Aren't you dreaming about it?"

"Go away!"

"I'll have a good check!" Hearing Yang Xiaoman's words, Xu mang drove her out of the chair on the spot. He looked at the screen and checked the data from the beginning to the end. His face was a little strange. He was excited with a trace of expectation and fear, and vaguely mixed with fear.

Yang Xiaoman: (~ ~)

finally admitted!

I can't kill you at night!

After nearly ten minutes of examination, Xu mang did not find any mistakes. At this time, he had to accept the reality and carefully turned his head. Seeing a strange smile on Xiaoman's face, he knew that it was another sleepless night.

Alas...

life is hard!

"What?"

"You look disappointed." Yang Xiaoman disdained to say: "will you still question me?"

"Ha ha..."

"see what you said." Xu mang said with an embarrassed smile: "even if I question the sky and the earth, and then question the air in the middle, I dare not question the queen... What... Your experimental results make me very satisfied."

"Hum!" Yang Xiaoman snorted coldly and asked in a hurry: "what should I do next?"

After thinking about it for a moment, Xu said seriously, "we can get the transition parameters of the energy band by fitting the data, and then we can almost do it... Because the next problem is the calculation. When we calculate together, I suspect that the structure of AAA may produce superconductivity."

"Let me help you with the fitting calculation." Yang Xiaoman said indifferently.

"Do you know how to fit?" Xu mang looks at Xiaoman and asks.

"Fitting is to connect a series of points on the plane with a smooth curve." Yang Xiaoman said: "the simple point is a smooth curve connecting the data. I study economics. There is a statistics of goodness of fit, which measures the gap between the expected value of the economic model and the actual value obtained in reality."

As a result,

Yang Xiaoman said, "don't forget... I'm the first place in the world mathematics competition!"

Looking at Xiaoman's serious expression, Xu mang asked curiously: "Xiaoman... Do you really plan to enter the financial circle? Take over the business at home? "

"Well..."

"originally my mother wanted you to take over, but you have chosen the research path, so I can only take over." Yang Xiaoman pursed his mouth and said in silence, "I can't really let my father work until he is seventy-eight years old."

Xu mang took Xiaoman's hand and said gently, "I will be with you until forever."

"Um..."

after that,

began to calculate intensively,

this work was relatively boring. While recalling the interesting events in the past, they carried out fitting calculation, which was about half an hour. The calculation results came out. To Xu Mang's despair, there was only one stacking mode that might produce superconductivity.

In ABC stack, the dispersion of electrons at the Fermi energy of graphene is very small, which leads to the increase of the density of states at Fermi energy, which creates a possibility for superconductivity, but this possibility is too mysterious.

Xu mang was surprised by this result. At first, he thought it was the AAA stacking method, but it turned out that he was the worst one.

However, there are also unexpected gains,

in the case of external vertical electric field, the Fermi energy gap will be opened, and the size of the energy gap can be controlled by the strength of the electric field.

"What's the matter?"

"It's like you're looking silly." Yang Xiaoman didn't know Xu Mang's experience and asked in a hurry: "is it useless to find out?"

"Well!"

"It's totally different from what I expected." Xu mang frowned and continued to read the data, and said painfully, "the data show that the stacking mode that is most likely to produce superconductivity is the worst one I have ever seen before.""Then accept the facts." "It's no big deal," said Yang Xiaoman

Xu sighed helplessly and said: "if so, it would be good. The problem is that the ABC stack mode only has the possibility of superconductivity. However, just now I found that this is impossible. In short, I failed."

Yang Xiaoman looked at Xu Mang's disappointed expression and decadent state. He didn't know what to do for a time. He could only comfort him silently: "don't worry... We will succeed."

"Well..."

Xu mang is very unconvinced now. He decided to start from the most basic research, first of all, to collect relevant papers, not to mention that Xu mang really found relevant materials in a certain paper.

It's about the electronic manipulation of graphene molar superlattices.

However...

the data in this paper are not many, most of them are predictions, but they give Xu mang a new inspiration.

"Little man!"

"Help me figure this out." Xu mang pointed to a large calculation process that he had written on the paper and said seriously, "I have to do other things."

"Well!"

"I'll do it." Although this large calculation process makes Yang Xiaoman feel headache, she still bites her teeth. At this time, willfulness is not a good thing. After all, it is related to the reputation of her fiance.

While Xiaoman was making painstaking calculations, Xu set out to search for papers on graphene and boron nitride.

After a while, Xu mang found a theory that an optical absorption peak was observed in the graphene molar superlattice, which corresponds to the electron transition near the Dirac point of the superlattice.

The graphene state of this column is exactly the same as that of AAA stack mode, but the data are quite different.

Got it!

Finally I understand!

Xu mang suddenly realized that his conjecture was not wrong, but a set of data he gave was wrong. Now wait for Xiaoman's calculation result. If the result is similar to his imagination, then there is no problem.

It's very dangerous,

almost tragic.

At this time, Xu mang has a sense of survival, almost no self closing.

However, Xu mang was not idle, and began to estimate the AAA stacking mode of three-layer graphene. In his estimation, the superconductivity of three-layer graphene needs another material to stack, which is boron nitride.

His basis is from the previous paper, when graphene is on boron nitride substrate, the effect of electronic state optical transition will decrease with the increase of Fermi level in graphene.

At 4:30 in the afternoon,

Yang Xiaoman finally solved the task Xu mang gave her. After handing the paper with the calculation process to Xu Mang, Xu mang jumped up excitedly and hugged Xiaoman. It was a fierce kiss.

(* ￣ 3 (￣▽￣)

(* ￣ 3 (￣▽￣)

(* ~ 3) (ε ￣ *)

this made Xiao man very happy. She seldom had such passive experience and basically forced him to do so by herself.

"It's done!"

"Little man!" Xu mang held her tightly in his arms and said happily, "we pushed graphene to a new height again!"

In fact,

in fact, Yang Xiaoman doesn't attach importance to these things. She is still immersed in just happiness and cannot extricate herself for a long time.

...

in a canteen of Jiangda,

Xu Mang and Yang Xiaoman were having a meal. Among them, countless girls met Xu mang with shame and asked to take a picture with him. Xu mang never refused to ask for a picture. However, until the appearance of a green tea, the vinegar jar filled with vinegar was completely kicked over.

"Professor Xu!"

"You... Why are you here?" A good-looking girl, found Xu Mang's figure, a face obsessed with saying: "Professor Xu... I'm your fan, I especially like you, since your live broadcast, I've been completely powdered by you."

Hum!

Fans?

Mom, I'm still vermicelli!

Looking at the gorgeous girl in front of her, Yang Xiaoman thinks that this woman is not a good person. Judging from her mature breath, this person must have a special purpose. Maybe she wants to make herself an Internet celebrity with the help of Xu mang.

Be alert!

Be vigilant!

"Sister?"

"Take a picture with Professor Xu for me. Thank you." The girl handed her mobile phone to Xiaoman, and then she was next to Xu Mang, with her head on the side of Xu mang.

Yang Xiaoman almost didn't explode in situ, but bearing in mind his cousin's iron rule, he didn't have a tantrum and took a picture in silence.

"Dear?"

"Are you full?" Yang Xiaoman said expressionless: "if you don't have enough, I'll give you another one.""Good!"

Yang Xiaoman: (* ~ ＾)

How are you!

I'm warning you to go!

However,

in the end, Xiao man went to order a meal for Xu mang. However, due to the large number of people at present, the time may be a little long.

And this just gives Xu mang a chance to pry the corner of the wall.

"Professor Xu?"

"Was that your girlfriend just now?" The girl asked curiously: "it seems that... It seems that all aspects of the body are not good."

"..."

"please lean on the side." Xu mang frowned and said, "I'll be misunderstood."

The girl moved to the side deftly, and said with deep feeling: "Professor Xu... You are so perfect. Why can't I meet such a good person as you?"

In the face of this problem,

Xu mang seriously thought about it for a while, and said solemnly, "it may be that your life is not good!"

I...

this...

hearing Xu Mang's words, the girl didn't know how to answer for a moment.

Isn't it straight?

"I said..."

"the photos have been taken and the chat is over. Should you go now?" Xu ran said helplessly, "Your perfume is poisonous... I smell so fast."

With a trace of resentment,

the rebellious girl left Xu Mang and met Yang Xiaoman, who came back with a meal.

In contrast,

the girl with a bad heart really can't understand why Professor Xu mangxu would find such a person as his girlfriend. He is better than her in any other place except for her beautiful face.

"Ah?"

"Why does the girl who pesters you stare at me?" Yang Xiaoman handed the meal he had just called to Xu Mang and asked in a strange way.

"I don't know."

Xu mang crazily grasps the rice, eats the mouth to flow the oil.

"Idiot?"

"When shall we go back?" Yang Xiaoman sat opposite him and asked curiously.

"Tomorrow morning."

"There's nothing wrong with the rest." Xu mang said with pride: "we black wind double evils will shock the world again!"

......

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