Chapter 453: 101K!
Recently, there has been an unexpected lack of calm in the mathematical community.
First Sir Attiyah and Riemann conjecture, then Schultz and Shinichi Mochizuki.
Not long ago, Peter Schultz and Jacob Stix co-authored a paper arguing that Shinichi Mochizuki's paper was problematic with the proof of inequality (1.5) and that small tinkering would not save the entire proof process.
Of course, in the eyes of Mochizuki, the mistake pointed out by Schultz is not a problem at all.
As for why, he will write a paper to explain.
Compared to Sir Attia's paper, which was not even a mistake, the controversy was clearly more topical in the mathematical community.
After all, the 500-page paper, which is said to be read by no more than 20 people in the world, caused a considerable degree of controversy as early as 12 years.
On one side is the founder of "Far Abel Geometry" and "Intercosmic Theory", as well as the disciple of Mr. Faltins, and on the other side is the founder of "Theory" and the new Fields Medal winner.
However, it is a pity that compared to number theory, algebraic geometry is not Lu Zhou's strong point, let alone the unpopular - "far Abel geometry".
The ABC conjecture was not the direction that Lu Zhou was concerned about, and after setting a label of concern for the progress of this matter, he did not pay attention to the specific situation, but focused all his energy on the research of superconducting materials.
Although the mathematical model is complete, that doesn't mean he doesn't need to be in the lab.
Any conclusions based on calculations are debatable, and the only thing that the computational material can do is guide the experiment, not determine the results.
Not only to make results as soon as possible, but also to use the experience gained from experiments to improve his theory, no matter what the reason, Lu Zhou can't do without the laboratory.
In this way, time passed day by day, and soon it was the end of October.
In the SEM room of Frick's chemistry lab, there was a small cheer.
As for why it was quiet.
The instruments and the samples they were looking at were so "fragile" that the experiments they were conducting were so full of metaphysics that even a little strong shaking could affect the final results.
"It's N-type doping, and we've succeeded the professor!"
Clenched into fists, Connie excitedly looked at the images captured by the SEM on the screen, and as he saved the data, he said with joy, "I knew that as long as you joined me in my project, the problem we faced would not be a problem at all!" ”
This sudden sycophant was as caught off guard as a sudden success, and Lu Zhou was a little embarrassed when he heard it, so he coughed lightly and said, "That's too exaggerated, what I provided was just a mathematical model." ”
Professor Chirik, who was standing next to him, was equally happy, but compared to Connie, he had seen a lot of storms and waves, and just laughed and quipped.
"Don't be modest, your mathematical model will undoubtedly come in handy, and if you use traditional methods to find this sample, we will be thankful that we can make a phased result before the end of the year."
Compared with the Jinling Institute of Computational Materials and the Sarot Laboratory, their work is mainly focused on theory, that is, to find those two bands with a structure close to zero dispersion......
According to Lu Zhou's mathematical model, the positions of these two bands were finally determined in experiments on the negative and positive doping of graphene Dirac points.
As for what's the use of this?
That's a lot of use.
Finding that zero-dispersion band, it was equivalent to finding the Mott insulator they were looking for.
When they applied a small gate voltage to this two-dimensional structural material, adding a certain amount of electrons to this Mott insulator, the individual electrons bonded to the other electrons in the graphene, allowing them to pass through places they couldn't flow to before.
During the whole process, Lu Zhou and his team continued to measure the resistance of the material while lowering the temperature of the material. They soon discovered that when the temperature dropped to 101 K, the resistance rate of decline reached an abrupt peak, and the value of the resistance was sharply approaching zero.
Obviously, this was what they were looking for.
I have to admit that sometimes there is no conflict between theory and applied research, especially in the field of materials science.
Of course, in addition to these easy-to-understand studies, there is a lot of more esoteric theoretical work in it, and there are also many problems that even Lu Zhou has not figured out how to explain.
For example, how to explain the bandgap width of the superlattice around 1.1°, and what order parameters should be used to describe the Mott insulator formed at this angle......
Maybe someone will do this more in-depth theoretical work in the future, or maybe their partners will be interested in doing this follow-up work.
In short, they changed the carrier concentration of the material by N-doping, and adjusted the overlap angle of the modified two-dimensional material, and finally found the "half-filled" structure they were looking for at a new angle.
When the temperature reached 101 K, the new material underwent a superconducting transformation, just as they imagined.
While the 101K isn't that hot, it's a staggering achievement, relatively speaking, there's no doubt that it's an amazing achievement.
Looking at Lu Zhou with an excited face, Connie continued, "Professor, how do we name the new material?" ”
Lu Zhou's expression was a little subtle: "...... Are you sure I'm going to name it? ”
To be honest, his ability to choose a name has not been very good.
He is quite self-aware of this.
However, the two men obviously didn't know him very well.
Not only Connie, but even Professor Chirik smiled and said, "Of course, you should do this job." ”
Lu Zhou smiled embarrassedly, and after thinking seriously for a moment, he spoke.
"In that case...... Let's call it SG-1. ”
SG is an abbreviation for superconducting graphene, although it can also be named by the preparation method or the type of compound, but it is more convenient to distinguish it from the function.
After all, considering the stacking of two-dimensional materials and the complex chemical treatment methods, there are too many graphene materials that can be classified as N-type doped......
Although he didn't have much confidence at first, after coming up with the name, Lu Zhou was quite satisfied.
Of course, it was not enough for him to be satisfied, and naturally he had to ask for the opinions of the other two collaborators.
"What do you think of the name?"
Connie:......
Chirik: ......
Seeing that the two of them suddenly stopped talking, Lu Zhou hesitated slightly.
“…… What's wrong? ”
Connie and Professor Chirick glanced at each other and made a helpless expression towards Lu Zhou.
"It's nothing, SG-1 is SG-1...... It's just such an exciting discovery, I thought you'd think of a slightly cooler-sounding name. ”
If you think about it, it seems that this guy's name has always been this style.
From Modified PDMS to HCS-2......
If I had known, I shouldn't have given him the opportunity to make a name.
Lu Zhou: "......"