Chapter 521: Three Schemes Far in the Lead

In the morning, the quiet city gradually became noisy. Vehicles flowed endlessly on the roads, and office workers on both sides of the street hurried along; domestically, it seemed there was no difference.

Song Yao and Xu Qingzhou chatted aimlessly for 10 minutes. Seeing it was 8:30, she didn't want to waste any more time. "Professor Xu, I'm heading out."

"Mm."

"You stayed up late last night and got up at seven this morning. Remember to rest well at noon; you won't die if you calculate two hours less. You're still young, yet you're overdrawing yourself, sporting two big dark circles under your eyes."

Student Song nagged.

"Got it, I'll do whatever you say."

Xu Qingzhou responded with a smile. It was clear she was a cold and aloof girl, yet she couldn't help but nag all day long.

However, the nagging School Beauty Song was exceptionally cute.

Seeing Xu Qingzhou agree, Song Yao finally ruffled his hair twice before trotting off to change her shoes.

Xu Qingzhou stood up and helped the school beauty fix her scarf and zipper.

School Beauty Song stood obediently, letting Xu Qingzhou fuss over her, her round eyes gazing at him.

They say the eyes are the windows to the soul, and this girl's eyes were truly beautiful—deep, crystal clear, and bright. Especially at this moment, it made Xu Qingzhou feel an itch in his heart.

"What are you looking at?"

Xu Qingzhou pinched the school beauty's cheek. Song Yao swatted his hand away, but reached out to pinch his instead.

"Don't move." Before leaving, Song Yao pulled Xu Qingzhou's face over and gave him a loud "mwah," leaving a lipstick mark on him before leaving with satisfaction.

"You're just torturing me."

Xu Qingzhou complained. The school beauty seemed to love leaving lipstick marks on his face lately, like she was stamping a seal.

Song Yao glanced at him haughtily. After walking a few steps, she stopped. "If you secretly stay up late again, you're dead."

After shaking her fist at Xu Qingzhou as a threat, the school beauty walked out with light steps.

"Pfft, and she's always shouting about wanting to be gentle." Xu Qingzhou shook his head, closed the door, and turned back to struggle with the manuscript on the table, picking up Er Miao, who was dozing on the sofa, on the way.

One could only say that having a woman in the house was different.

For his former self, staying up until three was a small matter. In the past, pulling all-nighters to design experiments was a daily routine. Even after becoming the lead of a key project, he often only slept three or four hours.

As for the result... no need to say.

Anyway, he couldn't follow in those footsteps again. Who knew if there would be another rebirth card if he died of overwork? Most importantly, he was married now, and had the fragrant and soft School Beauty Song.

"Meow~"

In his arms, Er Miao struggled, protesting the two-legged beast for disturbing its dream. But realizing it couldn't escape the big villain's clutches, it simply purred and went to sleep in Xu Qingzhou's arms.

At this time, two days had passed since Song Yao finished the model.

Not to mention, letting his brain relax, Xu Qingzhou really had some good ideas. After a small start, inspiration flowed like a sluice gate, pouring out endlessly.

Up to now, he had summarized three schemes.

First, combining his expertise in quantum mechanics and referencing the wave-particle duality of light, he would prepare sub-nanometer YO quantum dots through the quantum confinement effect, utilizing their quantum size effect to increase the depth of the pinning potential well.

The specific implementation path needed further discussion.

The second method, referencing the Schrödinger equation and wave mechanics model, was to epitaxially grow topological insulators, such as BiSe, on the surface of NbSn thin films, utilizing their topologically protected surface states to suppress magnetic flux line motion.

Then there was the final method.

Xu Qingzhou had once participated in the lunar exploration project and felt he could reference the extreme environment stability design concept. He would pre-implant He ion irradiation-induced nano-cavities into electronic equipment, capturing irradiation defects through the cavities and dynamically repairing the lattice. That is, adopting ion implantation technology to generate a controllable cavity array and using molecular dynamics simulation to verify the cavity's capture efficiency for defects.

"Right, now I have to choose one."

All three experiments actually had technical difficulties, and time was limited. He could only proceed with one first to break through the current bottleneck, then consider the subsequent small problems.

Xu Qingzhou gently spun the signature pen in his hand, his brain spinning rapidly, comparing the pros, cons, and feasibility of the three schemes.

Half an hour passed.

Xu Qingzhou's gaze fell on the second scheme.

【Topological Superconducting Interface Engineering.】

The difficulty was relatively low; he only needed to add Angle-Resolved Photoemission Spectroscopy (ARPES) to the existing equipment to verify the coupling of topological states and superconducting states, then combine it with Monte Carlo simulation to optimize the interface electron transport path.

He had previously performed corresponding calculations and found that when doing topological design, BiSe would cause lattice mismatch with NbSn, leading to interface defects. This could be combined with the transition layer Carson and the others were studying, reducing the mismatch degree by 2% through the transition layer.

Once settled, it could at least improve the current performance by more than 50%, reaching a commercial level.

If all three schemes were completed...

Far in the lead, leaving everyone behind.

This was the power of a cheater. His peers were still on the 40th floor, while he had already reached the 99th.

Unfortunately, this would be a massive project. Unless he stayed here for a few more years and built a more complete team, the difficulty was too great.

"Hoo~"

Xu Qingzhou let out a long breath, woke Er Miao up, put it on the floor, and picked up his pen to start calculating.

The model and calculations for YO nano-doping were already finished. Now he needed to solve the problem of topological superconducting interface engineering and YO nano-doping synergistic optimization of NbSn thin films.

Adding BdG equation modeling and coupling strength quantification, independently modeling the coupling between topological states and superconductivity, quantifying interface parameters, and finally correcting the pinning force model he had previously made. Superimposing the topological interface contribution and the YO contribution (f_{ext{YO}}).

Funds were limited, so he had to significantly reduce trial-and-error costs. The best way, of course, was to first simulate through mathematics to ensure the synergistic effect of the topological superconducting interface and YO nano-doping technology was maximized.

Just like before, through experiment-iteration, finally ensuring prediction accuracy and locking in the best process parameters.

After writing for half an hour, Xu Qingzhou took out his phone again and sent Carson the equipment that needed to be added, telling him to apply for it early and find someone to install it.

In terms of manual labor, the efficiency abroad was always touching.

He had to get the equipment settled in advance so that once the scheme was out, they could immediately start the experiment.

Temporarily, he needed a Molecular Beam Epitaxy (MBE) equipped with Bi, Se, and Nb sources, the Riber 32P. And another Focused Ion Beam (FIB), the FEI Helios 600i.

After writing out the framework of the experimental plan, he didn't continue. When noon arrived, the aftereffects of staying up late kicked in, and his body felt light.

Xu Qingzhou found it troublesome, so he simply boiled a bowl of noodles, covered it with leftovers, slurped it down, and went straight to the bedroom to sleep.

Before sleeping, he specifically took a posed photo to report his situation to Song Yao.

(End of chapter) ===== CHAPTER 522 =====