I am devoted to scientific research, but you want to trick me into having a love relationship?

Chapter 500: Add a little bit of black technology first
Xu Qingzhou's busyness continued until Wednesday.

At 1 p.m., he rubbed his sore temples, packed up his computer, put all the verification manuscripts into his bag, then went to the bathroom to wash his face and get rid of his sleepiness before driving to the laboratory.

"professor."

Carson, Sun Simin and Mars were the only ones attending classes in the lab.

"This is the latest experimental data." Carson was no better than him. He had two dark circles under his eyes and fatigue was written all over his face. During this period, Xu Qingzhou was secluded at home making models, and Carson was watching over the laboratory.

Xu Qingzhou put down his backpack, walked to the computer in the office, and said, "Thank you for your hard work. When the experiment is successful, I will give you more bonuses."

"Boss, I think there are better rewards, such as letting me leave work early, buy a bunch of flowers and go on a date with my girlfriend."

Carson grimaced.

While believing in miracles, we must also face the reality. The success of the experiment is still a long way off, but we can still strive for it.

"Okay, you can go home after the samples are sent to the annealing furnace." Xu Qingzhou nodded in agreement. You can't let the horse run without letting it eat grass.

"Oh, long live the boss!"

Xu Qingzhou looked at the data and said, "Well, the effect is not bad."

"Yes, look here. H plasma is loaded to reduce SnO to metallic Sn in real time. When the film grows, it is equivalent to using a hydrogen atom machine gun to shoot the oxide."

Speaking of experiments, Carson's eyes lit up and he told Xu Qingzhou about the samples.

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

"One month, 1.6 times. Is that possible?"

Carson felt that this goal was a bit unrealistic. They did not have much experience in this area before, so they needed to keep trying, which would take time. Moreover, they were still in the deposition stage, and no one knew what the samples would look like after annealing.

For example, if this set of samples proves to be unworkable during annealing, it will have to be readjusted or even the precursors selected.

"Of course, this is only the most conservative data." Xu Qingzhou was very confident. Looking at the data on the screen, he said, "I sent you an email with our new experimental plan."

"okay."

Carson sat down and checked the email Xu Qingzhou sent him.

After a while, Xu Qingzhou had a clear understanding of the sample situation. In terms of composition structure, the composition deviation was reduced to 0.9%, but the biggest problem was still SnO impurities and grain uniformity.

"Quantum mechanics calculation method?"

After reading the email, Carson swallowed his saliva. While he admired Xu Qingzhou's formidable mathematical ability, he also had some doubts. Before doing the experiment, he had of course memorized the information by heart, and this was the first time he had seen this thing.

It seems a bit mysterious, because Xu Qingzhou marked it in the data that if successful, Tc can be increased from 18 K to 25 K (liquid hydrogen temperature range), and Jc(12 T) can be increased from 1×10 to 3×10 A/cm.

What does this mean? While other teams are still making phones for the elderly, they have already come up with drawings of smart phones.

Xu Qingzhou said succinctly: "This involves topological state design and ultrafast dynamics control. Simply put, the Dirac cone of graphene and the Cooper pairs of NbSn form a synergistic effect, which enhances the electron-phonon coupling strength and thus increases the superconducting critical temperature."

The Dirac cone refers to the linear dispersion relationship of graphene, which gives its surface electrons ultra-high mobility and unique quantum tunneling properties.

Cooper pairs are formed through electron-phonon interactions.

When designing the interface between quantum dots and photonic crystal cavities, he accidentally discovered that if these two things were put together in the right way, there would be unexpected results.

"Okay, don't waste time. Practice is the only way to test whether a model is useful. Carson, take the sample for annealing first."

The annealing furnace can hold 10 samples at the same time. It is easier to operate than ALD deposition and can be completed in about 3 hours.

"it is good."

Carson nodded.

Xu Qingzhou first went to the materials department to look for transition metal chalcogenides, more precisely, metal chalcogenide WS, and planned to pre-deposit a single layer of WS on the graphene surface for transition. The Purcell effect was used to enhance the single-photon emission efficiency, and the reduction of interface defects could inhibit non-radiative recombination and improve the purity of the light source.

After getting the WS, Xu Qingzhou changed his clothes and went into the laboratory.

Use copper foil, put in the precursor Sn(NEt), introduce pulsed precursor heating, and cycle between 80°CD and 120°C.

Adding other substances to the sample will undoubtedly increase the difficulty of the experiment. After all, it is necessary to ensure that the various technical modules are seamlessly compatible and maximize the synergistic effect.
In addition to the need for precision in every step when making the graphene substrate, a chiral plasma pulse pretreatment was also added for WS.

Proceed in an orderly manner.

"Whoo~"

Xu Qingzhou looked at the samples in the equipment, let out a long sigh, and thought to himself that it was fortunate that he was not unfamiliar with the process.

The preparation of CVD graphene takes about 8 hours. He did not wait there foolishly, but went out to continue working on the algorithm of discrete wavelet transform in the economic model.

Carson is also performing gradient annealing according to Xu Qingzhou's requirements.

At three o'clock in the afternoon, the annealing was completed, but Carson did not leave.

"Hmm?"

Xu Qingzhou looked at Carson in confusion. Didn’t this guy say he wanted to leave early at noon?

"Dating? Why not study how to spray SnCl atomic mist on the graphene substrate? You know, the superconducting transition temperature is comparable to the emotional changes of girls."

Carson said with a shrug.

Xu Qingzhou smiled helplessly, agreeing with this statement to a certain extent. After all, School Beauty Song could hit her one second and come to her gently the next.

He put away his messy thoughts and said to Sun Simin and Mars who were taking notes on the side: "The test reports of these four sets of samples will be handed over to you two."

After annealing, the NbSn film can be directly tested by Raman spectroscopy on the graphene substrate without peeling it off first. After all, if the sample is broken, it can be thrown away directly, rather than having to waste electricity in the annealing furnace.

The two have been following the experiment for more than a month, and it's time to get started.

There is no need to make an appointment for shared equipment. The office is equipped with a portable Raman spectrometer that can handle simple characterization tests.

Sun Simin was stunned at first, then surprised.

"Ah, what if it breaks?"

Mars rubbed his hands. This was the first time they had handled this since joining the research group, although it was just putting the sample on the machine and pressing a few detection buttons.

"If you are willing, you can compensate me according to the price." Xu Qingzhou said with a smile.

Mars shook his head.

Xu Qingzhou didn't waste time either.

On this side, Sun Simin and Mars also "worked together" to put the first group of samples into the portable Raman spectrometer.

The two of them looked very cautious and would discuss each step with each other to make sure there were no problems.

Xu Qingzhou looked up and couldn't help but smile, remembering that he was the same when he first entered the laboratory, afraid that something might go wrong.

The two-hour experiment lasted until six in the afternoon.

"Professor, the scan is complete." Sun Simin came over and said timidly.

Xu Qingzhou nodded, asked Sun Simin and the other person to put the samples away, and then directly turned on the computer to look at the data.

(End of this chapter)