Xu Mang suddenly felt a little helpless, perhaps it was superfluous to worry, although the quantum research institute under Fermi Lab successfully proved the phenomenon of Klein tunneling using graphene, but the evidence is still not sufficient, if this evidence is used to explain Klein tunneling, whether others can accept it or not, they will definitely not be able to pass this level.

According to a report by the Quantum Institute under Fermilab, they studied the tunneling properties of a strained graphene monolayer driven by a vertically acting magnetic field, giving the transmittance through a magnetic barrier through a transfer matrix.

It is found that in small-angle scattering, unlike Klein tunneling in an electric barrier, the magnetic field can bind electrons in a strained magnetic barrier, and as long as the incident energy is not very large, the presence of strain can significantly increase the directional transmittance.

When the injected energy is large, the effect of strain is completely removed, so that the strained graphene and the ideal graphene have almost the same tunneling properties.

generally

This is the tunneling characteristic of graphene in a magnetic field under stress.

I'm sorry

I can't accept such evidence!

Xu Mang is full of disdain for this, obviously... This is a manifestation of quick success, and it is estimated that it is knowing one's own existence that has accelerated the speed of research, which has led to such a problem, and there is a lack of conclusive evidence.

"Professor Xu?"

"Do you have any good ideas?" said the young graduate student cautiously, "and now the physicists in the Western world are happy about this, they think that in the field of physics, you are no longer the undefeated figure, and now you can be defeated." ”

Xu Mang was stunned for a moment, and asked curiously, "This... Isn't it the tunneling characteristics of graphene in a magnetic field under stress... What's the big deal, whether others want to admit it or not, anyway, I don't admit that this evidence proves the Klein tunnel. ”

"But," said the young graduate student, "that's what the whole world thinks, and we haven't even found the right materials at the moment, so it's too hard to surpass them." ”

"Who said that?"

"I don't agree!" Xu Mang said seriously: "Isn't it just to find a suitable topological insulator material, just kidding... There is never a so-called difficulty in my dictionary, as soon as my eyes are closed and opened!"

“...”

Hearing Xu Mang's words, the young graduate student smiled bitterly, no one can brag about this, but only Professor Xu Mang can, no way... He's good at making it happen, but it's a bit overblown.

"Ahem!"

"How sure are you, Professor Xu?" asked the graduate student cautiously.

"Sure?"

"One hundred and twenty percent. Xu Mang said indifferently: "You go back now, by the way, talk to them, don't have any worries, everything is with me... Don't be afraid, what about the impact of the mechanism research report on super-large black holes?"

"The impact has been extraordinary. ”

"Nature Astronomy has been passed. The graduate student excitedly said, "We don't know why it's so fast, maybe it's because of you, but... Several of us made it to the front page of the school. ”

"Oh..."

"Keep up the good work!" Xu Mang said casually, then turned on the computer, and continued: "Help me bring the door when I go out." ”

moment

Xu Mang is left alone in the office, and now he is not easy, the people who oppose him all over the world are carnivaling, and the suitable topological insulator material is far away, what should I do?

Xu Mang fell into silence, according to the research of the previous two days, basically this topological insulator material belongs to a hybrid material, that is, the inside is an insulator, but the surface is metallic, and under a certain condition, the surface can be transformed into a superconducting material.

This greatly increased the difficulty, and the material samarium hexaboride was initially chosen because samarium hexaboride meets the condition that the inside is an insulator, but the surface is metal, and the surface allows the electrons to move freely, while the direction of the electron movement is locked in an intrinsic quantum property called spin.

However, there were no conditions on the surface of the Klein Tunnel, and either a new topological insulator material or special processing of the samarium hexaboride material was a difficult choice, and it was almost a desperate situation with no turning back.

But...

Xu Mang prefers the second option, which is to carry out special processing of samarium hexaboride material.

"Samarium hexaboride... How can this special be transformed into a superconductor material?" Xu Mang couldn't even think of a way to break his head, it was not something that humans could solve at all, and it was no less difficult to turn a topological insulator material into a superconducting material than a short flat and shriveled Xiaoman into a high-convex Xiaoman.

"Oh my God!"

"It's so difficult!" Xu Mang sighed, if he wants to succeed in this area, he must have mastery in topological physics, condensed matter physics, spectroscopy and theoretical theory at the same time, but... I've obviously reached the top of everything, but I still can't solve the problem.

"Hello?"

"Director Fang?"

"Is there anything you want me to do?" Xu Mang received a call from Fang Jun, the head of the Department of Physics at Fuda University, and said weakly: "I'm desperate now, to use an Internet phrase... The baby's heart, but the baby doesn't say, I'm too miserable. ”

“...”

"Isn't it about the Quantum Research Institute under Fermi Lab that successfully proved the Klein tunneling using graphene?" Fang Jun said indifferently: "It's normal to fail once in a while, after all, people can't go on smoothly all the time." ”

That's right, but I'm very unconvinced.

"Director Fang?"

"Aren't you looking for me just to enlighten me?" Xu Mang asked curiously: "I am now a world-renowned scientist, and I will be able to ask you to be an equal in the second half of the year, and we will all be academicians of the Academy of Sciences by then." ”

"You kid..."

"Forget it. Fang Jun smiled bitterly: "The principal asked me to ask you, do you still need graduate students to do research with you?"

Ha?

This... Really, I'm a training provider?

Come as you want?

"Ahem!"

"Not anymore for now. Xu Mang smiled and said, "That's right... In the future, I will charge double the fee, eat and drink me, use mine, and I will pay them a salary... Director Fang, in the future, each graduate student who comes to me for an internship will be charged 500,000 yuan per year, and the school will bear half of the research topic. ”

“...”

"This thing... You can tell the principal personally, and if he agrees, I have no opinion. Fang Jun smiled: "That's... Hang up first. ”

Syllable!

Hung up directly.

Xu Mang hurriedly made a phone call to the second grandfather and asked about the increase in money and the sharing of scientific research funds, not to mention... I didn't know how to speak for a while, but when I 'beeped', I hung up directly, and Xu Mang needed to organize the language.

Two minutes later,

Xu Mang dialed the phone again, and soon the urging call was connected.

"Hello?"

"Hey, hey, hey... Second grandfather?" Xu Mang asked with a smile: "Are you feeling okay lately?"

“...”

"I was in good health, but you kid called me, and I have a little cerebral congestion now. The second grandfather said angrily: "Did you think of any bad ideas again?"

"Ahem!"

"Second grandfather... Am I this kind of person?" Xu Mang said cautiously: "What... I'm here to discuss with you, and I think that the graduate students who come to my institute for internships... I'm going to give money in the future, and I was supposed to ask for money, but this time I'm just trying the water. ”

Regarding the matter of giving money, the second grandfather originally knew that he was quite puzzled before, Xu Mang didn't call to pay for the money, and now this call has finally come.

"Hmm!"

"I know about it. The second grandfather nodded.

"What..."

"Second grandfather, I think you're mistaken. Xu Mang said seriously: "I mean to add money in the future, don't be angry, don't be angry... Hear me explain... Second grandfather, you understand the situation in my family, Xiao Man, a loser, is too good at losing, I don't make some money to support my family, I'm afraid that our little two will starve to death in the future. ”

Hearing Xu Mang's words, the second grandfather was almost not mad, this guy really came with his mouth open, and couldn't help laughing and scolding: "You kid... I'm your second grandfather, I don't know the situation in your family yet? How much did your wife earn last year, your father-in-law told me a long time ago. ”

Oops...

This Nima,

Xu Mang was a little embarrassed, and said with a smile: "That... Add money?"

"Sensei!"

Syllable!

Hung up directly.

Xu Mang was stunned for a moment, thinking that he had auditory hallucinations, and after confirming it again and again, he was sure that he was hung up by the second grandfather.

Ah...

Scratching, I can't say anything, it's troublesome.

Xu Mang was so angry, he couldn't call Xiao Man and ask her to communicate with the second grandfather, compared to himself... The second grandfather seems to love Xiao Man even more, and there is basically no problem, but unfortunately, Xiao Man directly refused.

Never mind

Let's talk about it later, and solve the problem first.

Sitting in the office, with Erlang's legs crossed, don't say... In the confusion, Xu Mang thought of the Xu Yang structure formula.

maybe

With the poplar structure formula, you can get a hint of inspiration.

After recalculating the crystal structure of samarium hexaboride, Xu Mang seems to have found something amazing, he found a material with the same crystal structure as samarium hexaboride, called yttrium hexaboride... It has excellent physicochemical and electrical properties such as good chemical stability, electrical and magnetic properties.

"Huh?"

"That's wrong!" Xu Mang's brain produced a short circuit, samarium hexaboride and yttrium hexaboride... Which material is used as the base material?

ultimately

Xu Mang made two attempts, covering a layer of samarium hexaboride film on the surface of yttrium hexaboride, and the other scheme was to cover a layer of yttrium hexaboride film on the surface of samarium hexaboride, and then according to theoretical calculations, two completely different results were obtained.

ultimately

Xu Mang chose to cover the surface of yttrium hexaboride with a film of samarium hexaboride.

In theoretical calculations, when the entire assembly is cooled to a few degrees above absolute zero, yttrium hexaboride becomes a superconductor, and the metal surface of samarium hexaboride also becomes a superconductor due to its proximity to its crystal structure.

In this way, it conforms to all of my previous preconceived notions.

But...

It's a bit expensive!

Xu Mang thought for a moment, it was time for the 'vampire' Yang Xiaoman to vomit blood!

(°ー°〃) confused~

(ノへ ̄、) is sad!

"Ugh..."

"It looks like it's going to be another bloody storm tonight!"

......