"Hello?"

"Professor Gu?" Xu Mang's laughing voice reached Lao Gu's ears. From this hearty laughter, there was no sense of tension at all.

"Professor Xu, are you okay?" Professor Gu asked hurriedly.

"Let me simply confirm with you that you shouldn't be so nervous about some things. It's not that I can't solve it." Xu Mang explained: "I found a problem in your theoretical model. Can the singularity of angular magnetoresistance be widely observed in magnetic materials?

"

""

"The singularity of angular magnetoresistance?" Professor Gu asked curiously: "We don't seem to have observed the singularity of angular magnetoresistance."

"oh"

Xu Mang was silent for a moment and said seriously: "I will give you the standard theoretical model tomorrow morning. Goodbye."

Snap!

hang up the phone,

At this time, Professor Gu's expression was a little surprised. He was confused by Xu Mang. Suddenly, he received a phone call that made him unprepared. As a result, he asked a very strange question, whether the singularity of angular magnetoresistance can be widely observed in magnetic materials.

"How to say?"

"What did Academician Xu tell you?" Lao Fang, who was sitting in front of Professor Gu, looked at his friend curiously and asked hurriedly.

"Professor Xu asked me whether the singularity of angular magnetoresistance can be widely observed in magnetic materials. My research team and I have not discovered the singularity of angular magnetoresistance. How could he ask this question?" Professor Gu frowned.

The brows and expression are slightly strange.

The words fell,

Professor Gu added: "By the way, we will get a brand new theoretical model the next morning."

Lao Fang’s face is full of question marks

magic city,

Xu Yang Research Institute,

Xu Mang was staying in his office. Based on Professor Gu's research content, Xu Mang reconstructed a new theoretical framework. The new theoretical model was quite different from Professor Gu's, so Xu Mang called him to confirm

Got some questions.

In Xu Mang's theoretical model, new reactions and symmetries appeared. Xu Mang predicted that when the temperature of a crystal composed of cerium, aluminum, germanium and silicon is reduced to a certain level, about five K, when the magnetic field along the

When the high symmetry direction of the crystal is precisely aligned at one degree angle, the resistivity of the crystal will increase dramatically.

Just like the hands of a watch, which tell the time at twelve o'clock and twenty-four o'clock, the hands have no other position. Such resistance will occur only when the direction or vector of the magnetic field is in line with the axis of high symmetry of the material's crystal structure.

When the magnetic field rotates more than one degree from that axis, the resistance will drop sharply. This is a result of calculation. Although it is not yet known why this situation occurs in the model and the reason why it occurs, but Xu

The next step is to solve this problem.

Look for data with the same situation in traditional materials to see if this sharply enhanced property also exists in other materials.

Based on various data and Xu Mang's precise calculations, a seemingly correct conclusion can be obtained. The theoretical model shows that this material composed of cerium, aluminum, germanium and silicon is not as sensitive to magnetic fields as traditional materials.

Not the individual components react, but the absolute vector direction.

But it only allows a special state to be realized under special conditions, and the enhancement is highly limited by the magnetic field along the crystal axis, indicating that symmetry plays a key role. However, Xu Mang did not explore the magnetic moment arrangement in depth because it required

Conduct powder neutron diffraction research experiments on magnetic moments.

experiment?

Sorry, no time!

After all, he is an expert in theoretical physics, a giant in thought, and a dwarf in action.

However, through his own new theoretical model, Xu Mang discovered that this new concept plays a crucial role in understanding the topological properties and magnetic domain properties of materials. Therefore, Xu Mang reconstructed a 2.0 theoretical model based on the original one.

Among them, the spontaneous symmetry breaking caused by the ordered pairs of magnetic moments is related to the magnetic field and topological electronic structure. If the direction of the magnetic field is precisely controlled, switching between uniform and ordered low-resistance and high-resistance states can be achieved.

Next,

It is to solve a doubt in Xu Mang's mind, and to solve a question that he asked Professor Gu before, whether the singularity of angular magnetoresistance can be widely observed in magnetic materials.

Through model analysis,

Singular responses do exist in other materials because of the electronic structure in magnetic materials with a small amount of free charge, which occurs in point-like electronic structures and structures that allow electron momentum to depend on the magnetic order.

"Hello?"

"Come here, I have something for you." Xu Mang called Wang Ai with a very serious tone.

soon,

Wang Ai ran to Xu Mang's office and asked curiously: "Does Academician Xu have any tasks?"

"Help me get the first-principles electronic structure calculation done." Xu Mang handed over a piece of information and said to Wang Ai, "Hurry up a little bit, I'm waiting to use it urgently. This is your assessment. If you can't figure it out, I'll

We may consider letting you continue to stay in the gravitational wave detection laboratory, because you do not have the ability to use it in other fields."

Not to mention,

At this moment Wang Ai was full of fighting spirit.

Watching Wang Ai leave, Xu Mang couldn't help but stretch. The next step was to wait for the calculation results to rule out changes in atomic arrangement, that is, structural phase changes, as the cause of changes in the resistivity of cerium-based materials.

certainly,

If the result is different from what he predicted, then he will be completely disappointed, but Xu Mang is very confident in himself.

In the past, Xu Mang might write a proposal, formulate the next experimental steps, and do all the work by himself, except for the experiments. But now Xu Mang only provides a theoretical model, and will not do the rest even if he knows it.

Do.

At this point, it was more about training than doing research. From a professional scientific researcher to a trained scientific researcher, Xu Mang had undergone a qualitative change.

It stands to reason that this is a relaxing stage, but Xu Mang feels nothing but pressure, some pressure from the environment, some pressure from others, but most of it is his own uneasiness.

Xu Mang is now very worried about a situation. Wang Ai, Dong Yu, Zhang Yapeng, including Hu Jie, who has been an intern here for half a year. Xu Mang is worried that these people will leave here. Of course, the so-called leaving does not mean simply leaving the Xu Yang Research Institute.

, but left China.

It can be said that,

Wang Ai, Dong Yu and Zhang Pengyu should be regarded as Xu Mang's most proud disciples. From the moment the gravitational wave laboratory was built, these three people have been with him. They had constant problems at the beginning, but they cannot be said to be authoritative figures.

, that can be considered a top-level existence.

Dare you say that,

Any research institution is a highly sought-after product. Xu Mang is happy to see them continue to move up or take on the important tasks, but he does not want to see them leave China and go to foreign research institutions, never to be seen again.

return.

Xu Mang is very restrained in the amount of his income. Even if the Physics Department of Fuda University sends intern graduate students, Xu Mang will only take a look and point out the mistakes. He is worried that the talents he cultivates will never come after they go abroad.

How to solve it?

Sorry, the reality is mostly like this, Xu Mang can only resign himself to his fate.

"Hello?"

"My wife, it's over." Xu Mang received Xiaoman's call and asked curiously: "You sent another batch of supplies?"

"Um"

"Husband, one of my senior technical employees was poached." Yang Xiaoman was in a very depressed mood and said silently: "I have already reached the position of supervisor, but suddenly he left. I gave him back last month.

He proposed technical guidelines, but the news of his resignation reached my ears yesterday.”

The words fell,

Xiaoman said helplessly: "It's so cruel. You have already planned it, but in the end, you pretended to be willing to go through fire and water for the company in front of me."

"husband?"

"Is it true that for those who are truly determined to leave, the door will always be the quietest?" Yang Xiaoman said silently: "When I think of leaving in a big way, it is actually a test. There is no farewell for a real departure. It is never a lie.

Those who shouted at the top of their lungs to leave ended up picking up the broken pieces of glass one by one by themselves."

"And those who really want to leave just pick a beautiful day, wear the most ordinary clothes and go out, and then never come back." Yang Xiaoman sighed and said helplessly: "

Now I finally know the person I really want to leave. He is so stingy that even saying 'goodbye' feels like a waste of time."

"husband?"

"When you leave me, can you say something to me and then see me one last time."

At this time,

Xiaoman's tone was full of pitiable weakness.

""

"Don't make trouble!"

"Give me ten courages, and I won't dare to divorce you." Xu Mang said with a black line on his face: "Honey, are you going through menopause early? Is your menopause too early? It's almost twenty years early.

, or is it because you’ve been bored watching soap operas recently and your brain has gone crazy?”
To be continued...