Chapter 500: First add a little black technology

Xu Qingzhou's busyness lasted until Wednesday.

At 1 PM, he rubbed his sore temples, packed up his computer, stuffed the verification manuscript into his bag, and then went to the bathroom to wash his face to dispel his sleepiness, only then drove to the laboratory.

"Professor."

Only Carson was in the laboratory; Sun Simin and Ma Ersi were both in class.

"This is the latest experimental data." Carson was no better, with two dark circles under his eyes, fatigue written all over his face. During this time, Xu Qingzhou was in seclusion at home doing models, and Carson was watching the laboratory.

Xu Qingzhou put down his backpack, walked to the computer in the office, and said: "Hard work, after the experiment succeeds, will give you more bonus."

"Boss, I think there is a better reward, such as letting me get off work early, buy a bouquet of flowers and go on a date with my girlfriend."

Carson had a bitter face.

While believing in miracles, must recognize reality, experiment succeeds... still a bit far, but can still strive for it in front of eyes.

"Alright, after sending the sample to the annealing furnace, you can get off work first." Xu Qingzhou agreed. Can't let the horse run, and not let the horse eat grass.

"Ooh, long live the boss!"

Xu Qingzhou looked at the data, "Mm, the effect is not bad."

"Yes, look here, load H plasma, reduce SnO to metal Sn in real-time, when the thin film grows, it is equivalent to machine-gunning oxides with hydrogen atoms..."

Speaking of the experiment, Carson's eyes brightened, and he told Xu Qingzhou about the sample situation.

Xu Qingzhou nodded, said in a deep voice: "Our goal, within a month, increase Jc to 8×10^5 A/cm², which is 1.6 times the current."

"A month, 1.6 times... is it possible?"

Carson felt this goal was a bit hanging, they didn't have much accumulation in this regard before, so need constant attempts, all need time, and now still in the deposition stage, no one knows how the sample will be after annealing treatment.

For example, if this set of samples is proven to be unfeasible during annealing, still need to readjust, even choose precursors.

"Of course, this is only the most conservative data." Xu Qingzhou was very confident, looked at the data on the screen, and said at the same time: "I sent you an email, inside is our new experimental plan."

"Oh, good."

Carson sat down, checked the email Xu Qingzhou gave him.

Half a sound passed, Xu Qingzhou had already understood the sample situation. In terms of composition structure, composition deviation reduced to 0.9%, but the biggest problem was still SnO impurity and grain uniformity.

"Quantum mechanics calculation method?"

Carson finished reading the email, swallowed, while admiring Xu Qingzhou's terrible mathematical strength, was also a bit suspicious. Before doing the experiment, he of course had already known the materials by heart, and it was the first time seeing this thing.

Looks a bit mysterious, because Xu Qingzhou marked in the materials, if successful, Tc can go from 18K -> to 25K (liquid hydrogen temperature zone), Jc(12T) can go from 1×10^5 to 3×10^5 A/cm².

What concept is this, other teams are still doing old-age machines, they have already taken out the blueprints of smart machines.

Xu Qingzhou said concisely: "This involves topological state design and ultrafast dynamics control, simply speaking, graphene's Dirac cone and NbSn's Cooper pair form a synergistic effect, enhancing electron-phonon coupling strength, thereby improving superconducting critical temperature."

Dirac cone, refers to graphene's linear dispersion relationship making its surface electrons have ultra-high mobility and unique quantum tunneling characteristics.

Cooper pair is formed through electron-phonon interaction.

He once accidentally discovered when designing the interface of quantum dots and photonic crystal cavities that these two things put together in a suitable way would have unexpected results.

"Alright, don't waste time, practice is the way to test whether a model is useful, Carson, you take the sample to do annealing treatment first."

The annealing furnace can put 10 samples at the same time, operation is more convenient than ALD deposition, about 3 hours can get it done.

"Good."

Carson nodded.

Xu Qingzhou went to the material office to find transition metal chalcogenides, accurately speaking, metal chalcogenide WS2, planning to pre-deposit a single layer of WS2 on the graphene surface for transition.

Use Purcell effect to enhance single-photon emission efficiency, reduction of interface defects can suppress non-radiative recombination, improve light source purity.

Got WS2, Xu Qingzhou changed clothes and entered the laboratory.

Use copper foil, put into precursor Sn(Net)2, introduce pulsed precursor heating, cycle between 80°C and 120°C.

Adding other substances to the sample will undoubtedly increase the difficulty of the experiment, after all, need to ensure that each technical module is seamlessly compatible and maximizes synergistic effects...

Besides being precise in every step when making graphene substrates, for WS2, later also added a chiral plasmon pulse pretreatment.

Advancing in an orderly manner.

"Hoo~"

Xu Qingzhou looked at the sample in the equipment, let out a long breath, thought to himself, fortunately didn't get rusty.

CVD graphene preparation takes about 8 hours, he didn't wait foolishly, went out to prepare to continue doing the algorithm of discrete wavelet transform in the economic model.

And Carson here was also performing gradient annealing according to Xu Qingzhou's requirements.

3 PM, annealing completed, but Carson didn't leave.

"You... eh?"

Xu Qingzhou looked at Carson suspiciously, this guy said at noon he wanted to slip early.

"Date? Better to study how to spray a SnCl atomic mist on the graphene substrate, you know, superconducting transition temperature is more regular than a girl's mood changes."

Carson shrugged and said.

Xu Qingzhou smiled helplessly, agreed with this sentence to a certain extent, after all, Song Beauty Song can beat her in the previous second, and can gently stick over in the next second.

He put away the messy thoughts, said to Sun Simin and Ma Ersi who were taking notes on the side: "The test report of these four sets of samples is handed over to you two."

The annealed NbSn thin film can be directly Raman spectrum detected on the graphene substrate, no need to strip first. After all, if the sample is broken, can directly throw it, save having to take it to the annealing furnace to waste electricity.

These two followed the experiment for more than a month, it's time to get started.

No need to reserve shared equipment, the office is equipped with a portable Raman spectrometer, can handle simple characterization testing.

Sun Simin was stunned first, then turned to surprise.

"Ah, what if it breaks?"

Ma Ersi rubbed his hands, this was their first time handling it since entering the research group, although it was just putting the sample on the machine and pressing a few detection keys.

"If you are willing, can compensate at price." Xu Qingzhou said with a smile.

Ma Ersi shook his head.

Xu Qingzhou didn't waste time either.

On this side, Sun Simin and Ma Ersi "worked together" to put the first set of samples into the portable Raman spectrometer.

The two's expressions were cautious, every step would discuss with each other, confirm whether there was any problem.

Xu Qingzhou looked up, couldn't help but smile, remembered that he was also like this when he first entered the laboratory, afraid of any problems.

Two hours of experiment, these two dragged to 6 PM.

"Professor, scanned." Sun Simin came over and said timidly.

Xu Qingzhou nodded, let Sun Simin and the others put the sample away, and directly opened the computer to look at the data.

(End of chapter) ===== CHAPTER 501 =====