Chapter 517: Do you want to take a lick?

Inside the office, Xu Qingzhou sipped his coffee, smiled, and said: "Perhaps, when I have time, I will try this topic."

"Fine."

Hoern shrugged, paused, and couldn't help but ask: "Your physics experiment... superconducting thin film project, how is it? Any good news? I heard that the Maxwell team at Princeton has successfully completed the first phase of the experiment."

Xu Qingzhou knew about this. The Maxwell team announced a breakthrough yesterday. They developed an in-situ real-time monitoring + ML feedback system, which can perform multi-layer sputtering and high-temperature annealing optimization.

And they also used Bayesian optimization algorithms to compress the search time for optimal sputtering power from 6 months to 2 weeks.

The performance of the latest sample is Jc(12T) ≥ 2×10^5 A/cm.

"Encountered some thorny problems... Facts have proven that compared with these top teams, we still have a little bit of a gap."

Hoern was surprised, it was the first time he saw this guy being so humble.

"However, you can look forward to our future development. It also takes time to surpass them."

"..."

Hoern's expression was complex, and he said with some admiration: "I really should learn your mentality."

This is called a little bit of a gap? It's being crushed in all directions!

After drinking coffee, Xu Qingzhou said goodbye and left. On the way, he bought a hot dog sandwich and swallowed it, then went straight to the library.

Finding an empty seat, he sat down and soon entered the state.

His habit is to analyze the problem performance and core mechanism before solving a problem.

Must first figure out why.

This is actually similar to causal inference in economics, needing to distinguish between "correlation" and "causality," questioning "why x leads to y," constructing a counterfactual framework, and verifying the effectiveness of the mechanism.

Strictly speaking, the research logic of natural disciplines is about the same. The essence is to penetrate the appearance to construct an explanatory cognition of the world, but their naming is different. For example, in journalism, it is called the "five W principle."

Xu Qingzhou called up the data and the changes in the material under the electron microscope from the computer.

First, it needs to be analyzed from three parts: industrial-grade thin film, grain boundary weak-link dominance, and high-density pinning materials, comparing the gap with commercial grade.

On the structure diagram.

"Magnetic flux creep, that is to say, as the magnetic field increases, the magnetic flux line moves under the drive of the Lorentz force, which leads to energy dissipation and JC decrease."

Apartment.

Xu Qingzhou pinched his sore arms, got up to pour himself a glass of hot water, stood by the window to relax the exhaustion left by high-intensity brain use, and pondered for two days, finally having some ideas, and came up with four theoretical technical solutions.

The first type, introducing high-density pinning centers through doping or nanostructure engineering.

Second, using geometric constraints to enhance magnetic flux pinning, that is, pre-etching nanopores on the substrate through electron beam lithography to guide the formation of periodic defects during NbSn epitaxial growth.

The other two are screw dislocation networks and grain boundary AlO modification.

And Xu Qingzhou is more concerned about the first two solutions.

Both are constructing artificial lattices, forcing magnetic flux lines to arrange according to preset geometric rules, enhancing pinning force density through geometric constraints and periodic potential fields, and eliminating grain boundary weak links.

Er Miao lay on the sofa, continuing to be a useless little waste. In the bathroom, the Song school beauty was taking a shower.

"Continue."

Xu Qingzhou stood by the window for a few minutes, sat down again, and pushed the feasibility of the first two schemes.

15 minutes passed, the sound of rushing water in the bathroom disappeared. After a while, Song school beauty came out wearing a shower cap. Her little face was pink and moist from the steaming water mist.

Xu Qingzhou turned his head, seeing she didn't wash her hair, so he didn't get up to get the hairdryer, and put his mind on the manuscript.

Song Yao walked over in slippers, stood behind Xu Qingzhou, and gently pinched his shoulders.

"Is the plan written?"

Xu Qingzhou enjoyed Song school beauty's massage service, "Still a bit short, need to struggle again."

"I believe in you, it's time to rest, you've been calculating since the afternoon."

"Fine, combine work and rest."

Song Yao rubbed her face against Xu Qingzhou's cheek and went back to the bathroom to wash the underwear she had changed.

Xu Qingzhou closed the notebook and went to the sofa to take a nap.

The body was relaxed, but his thoughts couldn't help but think of the two plans just now.

Song Yao came out after hanging up the clothes and saw Xu Qingzhou sitting on the sofa in a daze again. This person is like this, once he starts thinking, he can't stop, sitting or lying down in a state of deep thought.

If it's always like this.

He must be going to become a bald man.

Thinking about it, Song Yao simply lay on the sofa and stuffed her feet into Xu Qingzhou's arms.

This is called entering the game with the body.

Xu Qingzhou looked at the feet placed on his thigh, white and tender, "Don't eat, thank you."

"?"

Song Yao stared with her eyes.

What don't eat?

"Fine, I'll eat."

Xu Qingzhou grabbed the fair ankle.

Song school beauty seemed to be stimulated, and pulled her feet back "whoosh." Looking at Xu Qingzhou's serious appearance, she held it for a long time, and squeezed out the two words "pervert."

She went to sit at the desk, unwilling to sit with this person.

Shouldn't have been mouthy, nothing to play with.

Xu Qingzhou imitated Song Yao's appearance and half-lay on the sofa, with his hands behind his head, which could not only be in a daze to relax his brain, but also watch beauties.

He looked at the girl and said: "You don't need to worry."

"I didn't worry."

Song Yao answered coldly.

Xu Qingzhou smiled, changed to a comfortable position and lay down, saying: "I'm just thinking about the technical feasibility of making nanopore arrays and nanopillar doping, not drilling into a bull's horn, and even less self-closing... just the first two methods you saw last night, theoretically speaking, the former effect is definitely better than

"Nanopore arrays require the use of a lithography machine."

Song Yao looked at the manuscript and quickly identified the problem.

"That's right. Although I really want to achieve everything in one step and make the nanopore array directly, the equipment is quite troublesome. Laboratories at MIT that have lithography machines are highly sought after and expensive. Forget it, let's just do the YO nano-doping process development."

Xu Qingzhou glanced out the window.

At this moment, through the blurred glass, one could see white snowflakes falling like goose feathers outside, swirling and intertwining.

The first snow of 2019.

He withdrew his gaze and issued an invitation: "It's only 9 o'clock. Do you want to take a break and watch a movie together?"

Song Yao glanced out the window. It was snowing, and a layer of frost had formed on the glass. The snowflakes and the city lights looked somewhat dreamlike.

Such cold weather was perfect for curling up in the arms of someone you liked.

But...

The school beauty Song felt it necessary to emphasize, instructing: "You are not allowed to get handsy."

"I won't."

Xu Qingzhou sat up to make room for the school beauty Song.

"And..."

Song Yao paused for a moment and added seriously: "Even more so, you are not allowed to lick my feet."

"..."

Xu Qingzhou might actually take a lick. After all, this guy always had some strange hobbies.

"I'm not a pervert, why would I lick your feet?"

Xu Qingzhou retorted decisively.

Although he did have such an impulse at times, he only thought about it. After being kicked by Song Yao last time, he didn't dare to anymore. Is it a crime to think about it?

No!

"Tsk."

Song Yao made a single sound to express her disdain, walked over in her slippers, sat beside Xu Qingzhou, squeezed her butt in, and hid in his arms.

"What movie?"

Xu Qingzhou picked up the remote control.

"You find one and take a look first."

When the two were together, Song Yao was basically too lazy to make choices.

Xu Qingzhou searched for a few minutes and finally settled on *Hachi: A Dog's Tale*. It was a very classic movie. Counting his past days, he should have watched it decades ago, and the plot and such were already blurred.

Er Miao wandered around the living room, landed beside the two-legged beasts, and was very interested in the furry thing on the screen that was just like itself.

(End of chapter)