Chapter 387

That's it!

Professor Fang, who was originally waiting for a little drowsy, instantly became extremely sober after listening to Gu Lu's words.

Professor Fang immediately got up from his chair and walked to Gu Lu's side in three steps.

"Gu, Professor Gu, what did you just say?" Professor Fang wanted to confirm again.

Gu Lu smiled slightly, "Professor Fang, the problem you mentioned has already been solved by me. ”

Gu Lu still believes that facts speak louder than words.

So I didn't explain too much to Professor Fang.

Pointing directly to the printed image of Raman spectrum, he explained to Professor Fang with a smile.

"Professor Fang, look at this, these are the two local vibration modes I found in GaN related to C impurities. ”

Professor Fang looked at it.

"These two local vibration modes ......"

Professor Fang is researching this field, and of course understands what these two local vibration modes mean.

Professor Fang swallowed hard, his eyes widened and he looked at Gu Lu in disbelief, "How did you find it?"

Gu Lu smiled slightly, "This process is not very complicated. ”

Gu Lu briefly introduced this process.

But Professor Fang heard Gu Lu say that he found a slight gap of only two millimeters in length in hundreds of Raman spectral images.

This requirement for observation is simply terrifying to the point of perversion.

And Gu Lu completed this feat in less than half an hour.

Professor Fang finally understood why Gu Lu was named a full professor at such a young age.

Because Gu Lu's strength is so strong that it is too perverted.

"So, what's the conclusion?" Professor Fang asked impatiently.

Gu Lu raised his hand and asked Professor Fang not to be too anxious.

"Wait a minute, I also need to combine first-principles calculations. ”

Gu Lu swept around and asked, "Is there any scratch paper?"

Professor Fang directly handed a stack of A4 paper used to print the materials to Gu Lu, "Trouble as soon as possible, I can't wait to know the result." ”

This dilemma has plagued the entire wide bandgap semiconductor field for almost a year.

Professor Fang didn't expect that this question would now be solved in front of him.

Professor Fang was very excited.

But in addition to the excitement, Professor Fang still felt a little regretful.

Because he was not the one who solved this technical problem, but a professor at the School of Mathematics.

Hearing Professor Fang's urging again, Gu Lu smiled faintly.

Gu Lu didn't delay, took the pen from his pocket, and started the formula calculation on the paper.

The first principle is to calculate from the beginning, without any parameters, only some basic physical constants, to obtain the principle of the basic properties of the ground state of the system.

So it's not that complicated.

A level that any physicist can master.

What's more, Gu Lu is a mathematician.

Therefore, there are no pauses in the whole process, and it is as smooth as silk.

The tip of the pen rubs against the paper to make a rustling sound.

Lines of symbols and numbers leap into shape under Gu Lu's pen.

Professor Fang stood aside, leaning on his side, looking at Gu Lu with a tense face.

He clenched his right hand, and his palm was oozing dense sweat from tension.

In order to avoid disturbing Gu Lu, Professor Fang didn't even dare to breathe too loudly now.

Tick tick tick ~~

Inside the compartment, except for the grinding of the tip of the pen, only the ticking of the wall clock on the wall remains.

Five minutes later.

Gu Lu wrote the last line of the formula on the paper.

Then stop writing.

"Hoo ——!"

Gu Lu leaned back in his chair and exhaled lightly.

"How is it?" Professor Fang on the side asked eagerly.

"It went well. Gu Lu smiled slightly.

He picked up the A4 sheet of paper and flicked it lightly with his fingers, "I've come to a conclusion." ”

Gu Lu glanced at Professor Fang with expectation in his eyes, and didn't ink again, "C impurities are in the GaN lattice, and they are replaced by the position of N atoms!"

As mentioned earlier.

There are only two possibilities for C impurities in the GaN lattice.

One is to take the place of the Ga atom.

The other is to take the place of the N atom.

The two possibilities were debated among scholars in the field.

And now, through a series of calculations, Gu Lu has come to a formal conclusion.

That's ......

C impurities are in the GaN lattice, which replaces the position of N atoms!

"It turns out that it has replaced the position of the N atom!" Professor Fang looked suddenly enlightened.

Gu Lu handed the A4 paper to Professor Fang, and said with a smile, "This is the specific process of using first-principles calculations, Professor Fang, you can verify it." ”

"No verification, no verification, I believe in Professor Gu's level. Although Professor Fang said that there was no need to verify, he still took the A4 paper from Gu Lu's hand, lowered his head and read it carefully line by line.

After the general sweep was completed and it was confirmed that Gu Lu's derivation process was fine, Professor Fang enthusiastically shook Gu Lu's hand.

"Professor Gu, thank you so much! If it weren't for you, I don't know when this problem would have been solved. Professor Fang looked very excited.

It's been mentioned before.

The third generation of wide bandgap semiconductors has not yet been maturely applied to the market because there are many technical problems that need to be solved urgently in this field.

And the problem that Gu Lu just solved is one of those many problems.

Therefore, the overcoming of this problem, in a sense, can be said to have greatly promoted the real industrialization of the third generation of wide bandgap semiconductor line of sight!

Moreover......

After determining the position where the C impurity replaces the N atom, a series of studies can be carried out.

There is a great possibility that the performance of the third generation wide bandgap semiconductor can be improved again.

This is a landmark breakthrough!

Compared to Professor Fang's excitement, Gu Lu seemed much more flat.

Gu Lu is not a researcher in this field, and he does not understand the difficult situation faced by this field.

"It's a little thing, it's just a little thing. Gu Lu waved his hand casually, "One of my students is researching a topic and needs to borrow the equipment from you." This is even a favor for me. ”

Gu Lu snorted and smiled.

However, Professor Fang was indeed speechless after hearing this.

Favor?

But the value of this favor is completely unequal.

Gu Lu's students just borrowed the equipment, which was a small matter.

You don't even need Gu Lu to come forward, just let Chen Mo come over with the approved slips.

And what about Gu Lu?

It directly solved a core technical problem in their field.

Indirectly, I don't know how much value is created.

There is no equivalence between the two at all.

Their research center owes Gu Lu a full adult invitation this time.

And Gu Lu, on his side, didn't think about these at all.

Now that he was talking to Professor Fang about borrowing equipment, he remembered that he seemed to have another student here.

"Oh no!" Gu Lu immediately got up and said goodbye to Professor Fang.

"Professor Fang, I'll go first, help me talk to Director Zhang. ”

After saying this, Gu Lu pushed the door and left the cubicle.