I Don’t Want to Win Lying Down

Xu Mang?

What's going on here?

You... I remember you were working on axions?

After being amazed, there was endless confusion. Fan Zhilong asked curiously: Why do we suddenly study Weyl semimetals? And this Weyl semimetal is no simpler than your axion. This theory was put forward more than 80 years ago. .”

Faced with this situation,

Xu Mang just smiled lightly, and said silently: Actually... I found that Weyl fermions may be related to axions. I want to prove Weyl fermions first, and then use the existence of Weyl fermions to find Axe.

you...

You have to overcome three problems at once. Fan Zhilong said helplessly: The leap from condensed matter to high-energy particles almost created three miracles.

Okay.

But... who would know. Xu Mang said with a smile on his face: They are all illusory things, and it is so difficult to find them, but Weyl Fermi and Weyl semimetals have relevant theoretical support , but the axion is pure prediction.

correct...

Professor Fan, do you think the physical properties of the Weyl semimetal I speculated are consistent with its Weyl fermion state? Xu Mang asked.

Fan Zhilong shook his head and said seriously: Give me half an hour, I need to take a good look at the content, I just glanced at it just now.

Um!

By the way, let me have breakfast. Xu Mang smiled and took out a ball of fried rice, and then sat in the corner to start eating. His ball of rice was relatively simple, with only a fried dough stick in it, and sprinkled it Take it with a pinch of salt.

But the simpler the food, the more delicious it tasted. Xu Mang almost felt the absolute balance between the glutinous rice and fried dough sticks.

at this time,

Professor Fan Zhilong began to read this manuscript, and all the above are normal things, a solution derived from the Dirac equation. According to the interpretation of quantum theory, Weyl fermions are not a kind of elementary particle.

To be precise, Weyl fermions exist as quasiparticle excitations in condensate physics.

Immediately afterwards,

Professor Fan saw the miraculous transformation. From the existence of Weyl fermion states, he deduced the possible physical phenomena of Weyl semimetals. According to the three characteristics given by Xu Mang, Weyl cones, Fermi arcs and The chirality is abnormal, and Fan Zhilong vaguely associates it with a material.

He had encountered this kind of material before, but because it was too strange and the research was too difficult, it was directly abandoned.

Xu Mang?

The physical phenomenon you predicted, I know that there is a material that is quite consistent. Fan Zhilong said seriously: In the past... when I was studying the Dirac electronic state of topological semimetals, according to Dirac semimetal materials Theory, I have an idea.

Xu Mang froze for a moment, then looked at him in surprise.

At that time, I was thinking...if a topological semimetal breaks into chiral Weyl cones by releasing the spin degeneracy on its Dirac cone, what kind of metal would it be? Fan Zhilong said : I didn't know what material it was at the time, but after reading your speculation about the Weyl semimetal, I found out...it might be a Weyl semimetal!

Fuck!

Seems...seems to be the case!

By analyzing the hint given by Fan Zhilong, Xu Mang found that as long as the topological semimetal was changed, the so-called Weyl semimetal could appear.

I rely on it!

Professor Fan...you are amazing! Xu Mang said with a smile, What kind of material are you talking about?

have no idea.

I'm talking about changing the structure according to the topological semimetal, but what kind of material is after the change... I don't know. Fan Zhilong said helplessly: This kind of breaking the inversion symmetry of time or space to realize Weyl semimetal, There is no small difficulty.

indeed,

The difficulty is not small!

According to Xu Mang's rough guess at the scene, Fan Zhilong's bold guess is to break the time-reversal symmetry by introducing magnetic atoms, or to realize the Weyl electronic state by continuously doping to adjust the composition and band structure.

but...

The magnetic domains brought by the magnetic atoms in the system and the destruction of the translational symmetry by the atoms will hinder the intrinsic properties of Weyl fermions.

How to achieve the Weyl electronic state by breaking the space inversion symmetry without requiring detailed and complicated regulation such as doping is the most critical factor at present.

...

...

The two stared at each other with big eyes and small eyes. The current situation is really embarrassing.

This problem seems to be unsolvable!

Xu Mang...

The help I can provide can only go up to here, and the rest is up to you. Fan Zhilong said: The Weyl semimetal material system is a research that has been very popular in condensed matter physics at present, and many people participated in it. in.

Xu Mang nodded, the Weyl fermion state is most likely to appear in condensed matter.

pity...

How difficult it is.

leave the lab,

Xu Mang came to the computer building slowly, and used the material science database to conduct a series of deletions based on three inferred materials, but the answer he got was no, which was another serious blow to Xu Mang.

what to do?

back to the apartment,

Xu Mang systematically explored this problem, and finally felt that he still needed to go through theoretical calculations. From the theoretical calculations, he could find materials that meet the properties. Whether it can be realized... Let's talk about it later.

...

Old Hua!

Do you know what Xu Mang is doing recently? Fan Zhilong found Mr. Hua and said seriously, He switched from your particle physics to condensed matter physics.

What?

He... he doesn't study axes anymore? Hua Yanfeng asked with a confused face, What's going on? Does Xu Mang think that axes can't be discovered?

Fan Zhilong shook his head and said seriously: That's not the case... On the contrary, this is the only way to find the axis.

Hua Yanfeng hurriedly asked: What's the matter?

Xu Mang thinks that Weyl fermions may be related to axions, but to prove Weyl fermions, we need to find Weyl semimetals. I read his manuscript this morning and found that he has studied Weyl semimetals in great detail. of.

Although Hua Yanfeng is a professor of particle physics, he also has a little understanding of other aspects, such as this so-called Weyl semimetal.

It's... no simpler than an axion!

Although there are equations and relative solutions, it is still difficult to implement.

this...

Unexpectedly, the research on axions will involve so many things. Hua Yanfeng said helplessly: I guess he is busy during this time.

hehe...

It's not just as simple as being busy.

I reckon Xu Mang is in a state of desperation right now. Fan Zhilong said with a wry smile, First we need to find Weyl semimetals, second we need to prove the existence of Weyl fermions, and finally we need to explore axions based on Weyl fermions.

...

Hearing Fan Zhilong's words, Hua Yanfeng didn't know what to say for a while, and there were twists and turns... What should I do?

this problem,

After much deliberation, Hua Yanfeng decided to find Fang Jun first. It would be best if the Department of Physics could provide Xu Mang with a little help, and let him do so many things alone. It is estimated that within a year, he will change. Gotta be silly.

moment,

Hua Yanfeng found Fang Jun and told the director of the physics department what Xu Mang was experiencing.

this problem...

I can only say that there is nothing I can do. Fang Jun shook his head again and again: It's not that the department doesn't want to support Xu Mang, it's because of its limited ability that it can't help at all. Weyl's research on semi-metals has never been proposed, including the later foreign students. Fermions and axions.

The only thing we can provide is money and equipment. Fang Jun said: How about...can I ask the academicians of the Academy of Sciences? I don't know if they will provide assistance to Weyl semimetals.

words fall,

Fang Jun picked up the handset of the landline and dialed a certain number.

The number was connected soon.

Hello?

Old Ji...it's me, Fang Jun. Fang Jun asked indifferently: You are an authority on condensed matter physics, do you understand this Weyl semimetal?

moment,

The other end of the phone fell into silence and didn't speak for a long time.

Fang Jun...

You guys from Fuda's Department of Physics are researching this? The person on the other end of the phone said curiously, It just happened to collide with my team. By the way, how far have you researched?

What?

You...Old Ji...you are not lying to me, are you? Fang Jun said in shock: Are you also studying Weyl semimetals?

right!

Our Institute of Condensed Matter, Tsinghua University, Peking University, and University of Science and Technology have joined forces to study Weyl semimetals. The theoretical part has been completed, and the experiment will be carried out soon. The man named Lao Ji said: What progress have you made?

for a while,

Fang Jun didn't know how to explain this situation. The research institute affiliated to the Academy of Sciences joined forces with Tsinghua University and Beijing University of Science and Technology to jointly study Weyl's semi-metals. This... Didn't this put Xu Mang on a dead end again?

nothing...

We have just started. Since you are studying, let's cancel the project. Fang Jun said indifferently.

When Lao Ji heard Fang Jun's words, he hurriedly said, Is that Xu Mang?

...

no!

I still have something to do here, so hang up first.

Fang Jun didn't give Lao Ji a chance to speak, so he hung up the call directly.

what's the situation?

The Academy of Sciences... is also studying Weyl semimetals? Hua Yanfeng asked.

The situation... the situation is very bad. Fang Jun said helplessly: The Institute of Condensed Matter under the Academy of Sciences is united with the three universities of Qing University, Peking University, and University of Science and Technology. One research institute plus three top universities, Xu Mang... Xu Mang was born at the wrong time.

The research institute affiliated with scientific research plus three top universities in China, and Xu Mang is the only one here...

Is the gap between the two too big?

It's actually good.

Let Xu Mang take a break. Fang Jun didn't care much about this, but he thought it was a good thing for Xu Mang, and he could take this opportunity to relax. If you push yourself too hard...it's easy to get into trouble. Even a nervous breakdown.

yes!

Who goes to study? Isn't research? On the contrary, I think it's more appropriate for Xu Mang to take a break. Hua Yanfeng laughed.

After Huayan Peak left,

Fang Jun immediately called Xu Mang and told him the real situation.

Hello?

Xu Mang?

Are you researching Weyl semimetals? Fang Jun said: Forget it, let's stop. The Institute of Condensed Matter under the Academy of Sciences, together with the three universities of Tsinghua University, Peking University, and University of Science and Technology, are working together to study Weyl semimetals. Currently They have completed the theoretical framework, take a break and don't push yourself too tired.

What?!

Have you also completed the theoretical framework?

Hearing Xu Mang's reply,

At this time, Director Fang Jun was at a loss.

 …

Miaoshuwu

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