Shen Qi used computer simulation software to construct the LSMO/LAO/STO heterostructure with different Sr doping concentrations, and generated a schematic diagram of the 4LSMO/3LAO/STO heterostructure, in which green, blue, red, coffee, pink, and gray balls represent Sr, La, O, Mn, Al, and Ti atoms, respectively, and they are arranged according to a certain rule.

It can be clearly seen that this heterostructure has a total of 11 layers containing 165 atoms, all of which adopt cubic phases, in which the number of layers of the overburden LSMO and the substrate STO are 4, and the number of layers of the intermediate LAO is 3, which is less than the 4 critical layers of LAO required for the metal-insulator transition at the LAO/STO interface.

In order to eliminate the influence of periodic boundary conditions on the calculation results, Shen Qi added a vacuum layer of 15 Å above the LSMO, and the calculated in-plane lattice constant of STO was 3.88 Å.

According to the first-principles calculation, Shen Qi found that the change of Sr doping amount can effectively regulate the internal polarization field of the LSMO overlay and realize the metal-insulator transition at the LAO/STO interface.

"The shift of positive and negative ions in the LAO layer is significantly suppressed by the offset of the internal electric field due to the electronic restructuring, so the polarization catastrophic mechanism seems more convincing. Shen Qi withdrew from the simulation software after saving, and after looking at these structural diagrams and energy level distribution diagrams for a long time, he felt that his eyes hurt so much.

The harvest is still there, Shen Qi calculated all day and got some useful data.

With the simulation data, you can start to develop theories, and the more formal way of saying it is theory construction.

But the amount of data is still too small, and Shen Qi is a little empty in his heart to construct a theory.

Today's experimental equipment can verify most condensed matter physics theories, and theories with a little loopholes will be slapped in the face by others in minutes.

The confrontation in mathematics is mainly a theoretical and logical deduction, and whoever has a big brain and strict logic will win.

Contemporary physicists don't do this, there is nothing to talk about theoretically, and if there are differences, let's use the equipment and use experimental data to speak.

After a busy day's work, Shen Qi returned to the faculty dormitory, and the furniture and appliances of the 150-square-meter apartment he had allocated had been purchased, and he moved in with Ou Ye after a while.

Entering the living room, Shen Qi saw Ou Ye sitting on the sofa in a daze, expressionless, unhappy or disgusted, just like a statue.

"I'm back. Shen Qi took off his coat and threw it on the sofa.

"Oh. Ou Ye snorted a word.

"Rest for a while, and then let's go eat outside?" Shen Qi asked the family leader about the dinner arrangements.

"Don't go. Ou Ye hummed two words.

Shen Qi cautiously asked: "Dear, what's wrong with you, are you still in a mood? Last time we were in the organizational life of our department, I got your approval to go." ”

"Huh. Ou Ye moved his lips, as if he was smiling.

"Huh. Shen Qi laughed with him.

Ou Ye stroked her abdomen, maintaining her unique, mysterious, non-smiling expression: "Tell you good news." ”

"This ......" Shen Qi was as if he had been struck by lightning, first shocked, and then surprised: "Xiao Yezi, are you happy? I'm going to be a father?"

"I'm going to be a father!" Shen Qi jumped up violently, this is really good news, suddenly I am about to become an old father.

"Then let's hurry up and get the certificate! Tomorrow we will go to the Civil Affairs Bureau, and after getting the certificate, we will set up a show, and then go to our hometown to continue to put it, and nothing should be done on the table. After the excitement, Shen Qi maintained the calm and rational nature that a theorist should have in the face of emergencies, and he asked Ou Ye: "It's been a few months, when did you do the examination?"

"That's what I just knew. "Ouye was calm from start to finish.

Shen Qi leaned his face sideways and pressed it to Ou Ye's little belly, concentrating on the dynamics in Ou Ye's abdomen: "The movement is not small, could it be twins?"

Ou Ye patted Shen Qi's head: "Get up, who said I was pregnant?"

"Huh?" Shen Qi was stunned, and he asked puzzledly: "What kind of good news is it that you show that mysterious expression and touch your stomach?"

"I won the prize. Ouye said the answer.

"Winning an award?"

"Well, the Morningside Math Prize. ”

"Oh, I'll go, that's all the good news?" Shen Qi's heart didn't fluctuate, and he even wanted to laugh a little.

"Professor Shen doesn't like this kind of small award, but I'm very happy. This is Oye's first major math award nomination, and she is certainly happy.

"The Morningside Mathematics Award, the Chinese Fields Medal, I haven't won this award, a good thing, a great thing, congratulations to you Xiao Yezi, you finally won the award. Shen Qi has returned to normal, the old father can't be for the time being, and his girlfriend's award is worth celebrating.

"If you win the award, you will win the award, why do you touch your stomach, this is not your habitual action. Shen Qi still didn't understand, why Ou Ye was touching his stomach while conveying the good news.

"Lunch was late and so filling. Ou Ye touched her stomach again, and she poked Shen Qi's chest: "Eh, you like children, don't you?"

"I like it, we'd better have two, a boy and a girl. Shen Qi said.

"Then you have to get a certificate. Ou Ye reminded.

"It's too late this year, we'll get things done next year. "Shen Qi and Ou Ye will both be 26 years old next year, and they will pass the age of late marriage and late childbearing, so it's time to do something.

Ou Ye pinched Shen Qi's ears: "Eh, Shen Qi, marriage is a major event in life, why do I feel your tone, like going to the supermarket to buy cabbage?"

Shen Qi sat up straight and said: "Next year, we will have a wedding, I, Shen Qi, will marry you in the door, and the guests who come to our wedding, the Philippine Award winners will sit at one table, and the Nobel Prize winners will sit at one table, and we will not lose to others on the scene." ”

"Blow you!" Ou Ye giggled, she said: "I believe that the winner of the Philippine Prize will give you face, but I will not believe in the Nobel Prize." ”

"Ouye, you wait for me, I will definitely give the Nobel Prize boss who has gathered a table. ”

Ou Ye became vigilant: "If you can't get together a table of Nobel Prize bosses, you won't get married?"

"Marriage still has to be married, the Nobel Prize is not enough, the professors come to make up. ”

"Skin!"

"Peel it off, and then let's go out to dinner together, you won't be hungry if you don't peel it." Shen Qi picked up Ou Ye and entered the bedroom, and skinned up.

......

The next day, Shen Qi inquired, Ou Ye had really been nominated for the Morningside Mathematics Award, and her call for the gold medal was very high, and the reason why she was selected for the nomination list was that it completely proved the Jesmanovich conjecture.

The Morningside Mathematics Award was established by a Hong Kong business tycoon, and the Morningside Mathematics Center was entrusted to organize, select and present the awards.

The Morningside Mathematics Award mainly recognizes Chinese mathematicians under the age of 45 who have made outstanding achievements in pure mathematics and applied mathematics, and each year has one gold medal and several silver medals.

Shen Qi was not selected for the Morningside Mathematics Prize because no one in the Chinese mathematics community could judge him.

Shen Qi didn't want to win this award, it didn't make sense to occupy a place, it was better to leave it to a young mathematician with potential, such as his girlfriend.