I really don't want to lie down and win

"..."

Finished!

Never thought that I would meet Professor Xu, he is a normal person!

It's dead now.

at this time,

Professor Tian found that everyone's mood was suddenly low. He knew that he was overwhelmed by the news, so he couldn't say he was useless. When he heard that Xu Mang was also involved in the study of Weyl semi-metals, he had the same expression and emotion.

"Don't worry for now...Professor Xu Mang's progress is far behind us."

words fell,

Professor Tian hurriedly added: "But we can't slack off because of this, we must put up 120% of our energy and work hard to get this subject down!"

moment,

Everyone returned to their usual spirits, not because of Tian's unmotivating words of encouragement, but because of his first half, Xu Mang's progress was far behind his own.

After Professor Tian left,

The team members in the lab started a discussion, and the topic of the discussion was almost related to Xu Mang.

"Do you think...Professor Xu will surpass us?"

"Probably not. According to my analysis and judgment, combined with the actual situation, there is no one around Professor Xu to assist him. After all, Fuda's physics is not ranked very high in the country."

"I basically agree with this judgment."

At this time,

A dissonant voice appeared.

"Don't...don't have such illusions, really... how many people's faces have been beaten by Professor Xu, and how many people's faces have been smashed to pieces, he is Xu Mang!" a girl said helplessly. : "Do you understand what it means?"

nonsense!

Of course I understand, isn’t this giving yourself a boost!

A beautiful dream is like a bubble, it bursts with a single poke, but there is still a lot of hope left here, after all, God said...Professor Xu's progress is far behind us, as long as we maintain this speed, basically Can't catch up.

premise,

No trouble.

...

Fuda,

Condensed Matter Physics Laboratory.

Fan Zhilong was anxiously waiting for Xu Mang. He had just received a call from Xu Mang asking him to study Weyl semi-metals with him. Faced with this request, Fan Zhilong naturally agreed unconditionally. He also hoped to accumulate some experience in this area.

Why haven't you come yet?

We've been waiting for almost 5 minutes!

At this time,

Xu Mang came to the laboratory slowly, saw the anxious Fan Zhilong, and said with a smile, "Professor Fan...why is it so early?"

"After I received your call, I came here directly..." Fan Zhilong said hastily, "What kind of material is it?"

"Ha ha."

"Don't worry..." Xu Mang took out a stack of manuscript paper from his satchel and handed it to Fan Zhilong.

get the manuscript paper,

read it,

Fan Zhilong's expression became a little serious, TaAs crystal... turned out to be this kind of material!

"Xu Mang..."

"Are you sure this TaAs crystal is the predicted Weyl semimetal?" Fan Zhilong asked, "I feel... why is it a little unreliable?"

Xu Mang was stunned for a moment, and asked curiously, "Why is it unreliable?"

words fell,

Xu Mang touched the satchel here, and found out the other half stack of manuscript paper, he couldn't help but said with embarrassment, "I'm sorry...there's more here...I forgot, the front is some theoretical designs, and the back is Principle calculation."

"..."

Facing the big Xu Mang, Fan Zhilong was speechless for a while, silently took the other half of the manuscript, and then began to read it.

moment,

Fan Zhilong was stunned by the process inside. Although nearly half of the content was incomprehensible, the general meaning could be roughly analyzed through the other half of the content.

Don't ask if you're right,

So much content... it took just over three hours to complete?

......

Chapter 542 The Prelude to the Storm (3/3, adding more for Bit Dark)

Three hours,

Including theoretical aspects, calculation aspects, and even the next experimental part, Fan Zhilong felt that Xu Mang had redefined the concept of three hours of time. It turned out that three hours could do so much content, and it would even change an 80-hour period. years of prophecy.

In this manuscript, first of all, two schemes for obtaining Weyl semimetals are obtained theoretically. One is to break the time reversal and maintain the central inversion symmetry, and the other is to maintain the time reversal symmetry and break the central symmetry inversion. play.

According to the first type, Xu Mang gave the materials of pyrochlore structure, spinel structure, common insulating material, and topological insulating material; if according to the second type, Se and Te crystals synthesized under pressure provide negative BiSb and ZrTe, and Dirac semimetals, evidence of magnetoresistance possibility.

According to Xu Mang's conclusion, due to the magnetic domains brought by the magnetic atoms in the system and the destruction of translational symmetry by impurity atoms, the study of the intrinsic properties of Weyl fermions in the experiment is hindered, and the preparation of materials is relatively difficult.

So Xu Mang chose the second method to find a non-magnetic material.

TaAs crystal has become the best choice,

The theory seems to be true, but there is not much evidence, the kind of direct evidence, numerical proof.

And his second principle calculation solved all the previous doubts, and also ran counter to the previous theory. This material has no center inversion but maintains time-reversal symmetry, and can be synthesized naturally without mixing. Miscellaneous and other detailed and complicated regulation.