I Don’t Want to Win Lying Down

"Xu Mang?"

"What the **** is this?"

"You...I remember you were studying Axes?"

After the surprise, there was endless confusion. Fan Zhilong asked curiously: "How come you suddenly studied Weyl semi-metal? And this Weyl semi-metal is no simpler than your axe. This theory was put forward more than 80 years ago. ."

Faced with this situation,

Xu Mang just smiled indifferently, and said silently: "Actually...I found that Weil fermion may be related to Axion. I want to prove Weil fermion first, and then look for Weil fermion based on its existence. Axe."

"you..."

"You have to overcome three problems at once." Fan Zhilong said helplessly: "From condensed matter to high-energy particles, almost three miracles have been created."

"Okay."

"But... who knows." Xu Mang said with a smile on his face: "They are all illusory things. It is so difficult to find them, but Weil Fermi and Weil Semi-Metal have related theoretical support. , Axion is a pure prediction."

"correct..."

"Professor Fan, do you think the physical properties of the Weil semi-metal I have speculated are consistent with the Weil 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 took a look."

"Ok!"

"By the way, I have breakfast." Xu Mang smiled and took out a ball of glutinous rice, and then sat at the corner to start eating. His glutinous rice was relatively simple, with only one fried dough stick in it, and then sprinkled it. A little salt.

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

at this time,

Professor Fan Zhilong began to read this manuscript. The previous things were normal, a solution derived from the Dirac equation. According to the interpretation of quantum theory, Weyl fermions are not a kind of elementary particles.

To be precise, Weyl fermions exist in the form of quasi-particle excitation in condensate physics.

Immediately after,

Professor Fan saw the miraculous transformation. From the existence of the Weyl Fermion state, he speculated about the physical phenomena that the Weyl semimetal may exhibit. According to the three characteristics given by Xu Mang, Weyl cone, Fermi arc and With abnormal chirality, Fan Zhilong vaguely thinks of a material.

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

"Xu Mang?"

"The kind of physical phenomenon you predicted, I know that there is a material that fits well." Fan Zhilong said seriously: "In the past...when I was studying the Dirac electronic state of topological semimetals, based on Dirac semimetal materials Theory, I came up with an idea."

Xu Mang was stunned for a moment and looked at him in surprise.

"At that time I was thinking... If the topological semimetal is degenerate by removing the spin on its Dirac cone and split into a chiral Weyl cone, what kind of metal will it be?" Fan Zhilong said : "At the time I didn't know what material it was, but after reading your speculation about the foreign semi-metal, I found... it might be the foreign semi-metal!"

Damn it!

It seems...it seems to be the case!

Xu Mang analyzed the tips given by Fan Zhilong and found that as long as the topological semimetal is changed, the so-called Weyl semimetal can appear.

"Damn!"

"Professor Fan...you are awesome!" Xu Mang said with a smile, "What kind of material is it?"

"do not know."

"I mean to change the structure according to the topological semi-metal, and what material will be changed after the change... I don't know." Fan Zhilong said helplessly: "This breaks the reversal symmetry of time or space to realize the Weyl semi-metal, There is no small difficulty."

indeed,

The difficulty is not small!

According to Xu Mang’s rough speculation on site, Fan Zhilong’s bold speculation was to break the time-reversal symmetry by introducing magnetic atoms, or to achieve the Weyl electronic state through continuous doping of control components and band structures.

but...

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

How to realize that the Weil electronic state can be achieved by breaking the spatial inversion symmetry without the need for detailed and complicated adjustments such as doping. This is the most critical factor at present.

"..."

"..."

The two of them stared at each other and looked at each other. The current situation is really embarrassing.

There seems to be no solution to this problem!

"Xu Mang..."

"The only help I can provide is here, and the rest is up to you." Fan Zhilong said: "Speaking of the Weyl semi-metallic material system, it is currently a very popular research in condensed matter physics. Many people participate. among them."

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

unfortunately...

This is so difficult.

Leave the laboratory,

Xu Mang came to the computer building in a daunting manner. Using the material science database, he made a series of deletions and selections based on the three inferred materials, but the answer was no, which was another serious blow to Xu Mang.

How to do?

Back to the apartment,

Faced with this problem, Xu Mang carried out a systematic exploration, and finally felt that it still needs to be calculated through the principle. From the calculation of the principle, we can find the material that meets the nature. Can it be realized? Let's talk about it later.

...

"Old Hua!"

"Do you know what Xu Mang is doing recently?" Fan Zhilong found Hua Lao and said with a serious face: "He switched from your particle physics to condensed matter physics."

"what?"

"He...he doesn't study Axion anymore?" Hua Yanfeng asked with a confused look: "What the **** is going on? Does Xu Mang think Axion can't be discovered?"

Fan Zhilong shook his head and said seriously: "Not so...On the contrary, this is the only way to find Axes."

Hua Yanfeng hurriedly asked, "What is going on?"

"Xu Mang thinks that Weil fermion may be related to Axion, but if we want to prove Weil fermion, we need to find Weil semimetal. I read his manuscript this morning and found that he has studied the Weil semimetal in detail. of."

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

This...not simpler than an axe!

Although we have equations and relative solutions, it is still difficult to realize them.

"This..."

"Unexpectedly, the research of an Axion would involve so many things." Hua Yanfeng said helplessly: "It is estimated that he will be busy during this time."

"Ha ha..."

"It's not as simple as being busy."

"I guess Xu Mang is already in a state of desperation." Fan Zhilong smiled bitterly: "First of all, we must find the Weyl semi-metal, secondly prove the existence of Weil fermion, and finally explore the axon based on Weyl fermion."

"..."

Hearing Fan Zhilong's words, Hua Yanfeng didn't know how to speak for a while, but twists and turns...what should I do?

this problem,

After thinking about it, Hua Yanfeng decided to find a little horse. It would be best if the Department of Physics can provide Xu Mang with a little help. Let him do so many things alone. It is estimated that within a year, people will change. It's silly.

moment,

Hua Yanfeng found Fang Jun and told the director of the physics department of Xu Mang's current situation.

"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 that the limited ability can't help at all. We've never put forward the research on the semi-metal subject of Weyl, including the other side. Fermion and Axion."

"All we can provide is money and equipment." Fang Jun said, "Why don't I ask the academicians of the Academy of Sciences? I don't know if they help them on Weyl Semimetal."

Words fall,

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

Soon this number was connected.

"Hey?"

"Lao Ji... it's me, Fang Jun." Fang Jun asked indifferently: "You are an authority on condensed matter physics. Does this Weir semimetal understand?"

moment,

The other end of the phone fell into silence, and there was no talk for a long time.

"Fang Jun..."

"Your Fuda Physics Department is studying this?" The person on the other end of the phone said curiously, "I just happened to collide with my team, so what is the point of your research?"

"what?"

"You...Old Ji...are you lying to me?" Fang Jun said in shock: "Are you also studying Weyl semi-metal?"

"Correct!"

"The Institute of Condensed Matter of our Academy of Sciences, and the three universities of National Tsing Hua University, Peking University, and University of Science and Technology have jointly researched Weyl semi-metals. The theoretical part has been completed and the experiment will be carried out soon." The man named Laoji said: "What's your progress?"

For a while,

Fang Jun didn't know how to explain this situation. The research institutes affiliated to the Chinese Academy of Sciences and National Tsing Hua University, Peking University, and the University of Science and Technology jointly studied Weyl semi-metals. This... didn't this put Xu Mang on his way again?

"It's nothing..."

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

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

"..."

"No!"

"I still have something to do, hang up first."

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

"what's the situation?"

"The Academy of Sciences... is also studying Weyl semi-metal?" Hua Yanfeng asked.

"The situation...the situation is terrible." Fang Jun reluctantly said: "The Institute of Condensed Matter under the Academy of Sciences, in conjunction with the three universities of National Tsing Hua University and Peking University, has one research institute plus three top universities, Xu Mang... .Xu Mang is really untimely."

Research affiliated research institutes plus three top domestic universities, and here is Xu Mang alone...

Is the gap between the two too big?

"Actually it's good."

"Let Xu Mang take a rest." Fang Jun didn't really care about this. Instead, he felt that this was a good thing for Xu Mang, and he could take this opportunity to relax. If he is pressed too tightly... Even mental breakdown.

"Yes!"

"Who is going to study? On the contrary, I think it is more appropriate for Xu Mang to take a break." Hua Yanfeng laughed.

After Hua Yanfeng left,

Fang Jun immediately called Xu Mang and told him some realistic situations.

"Hey?"

"Xu Mang?"

"Are you studying Weyl semi-metal?" Fang Jun said, "Forget it~www.readwn.com~The Institute of Condensed Matter under the Academy of Sciences, and the three universities of National Tsing Hua University, Peking University, and University of Science and Technology are working together. Weir Semi-Metal, they have completed the theoretical framework so far, so take a break and don't push yourself too tired."

"what?!"

"Have you completed the theoretical framework?"

Hearing Xu Mang’s reply,

Director Fang Junfang looked at a loss.

......

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