Cao Yuan, Nature posted again! You have heard that right, the eighth chapter of nature was published in his life by the graphene god Cao Yuan.Still a strong stand for “a work + authorship”:
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This time, only 3 months have passed since his last science.
The Great Paperist has so far published a total of 8 Nature + 1 Science.
Of those, 4 articles were intensively published in the first half of 20 articles.
No wonder he is called a “graphene driver”.
Why did graphene research again affect the main topic this time?
The Cao Yuan team found that a three-layer graphene twisted with a magic angle (1.56 degrees) could still maintain superconductivity under a super-strong magnetic field.
Nature commented that the significance of this finding was as follows:
The future will help design more powerful MRI devices and open up new avenues for building more powerful quantum computers.
His mentor Jerillo-Herero believes:
Although this three-layer graphene is not ultimately required for stable quantum computing, it would be easier to design new materials on this basis.
The critical magnetic field is 3 times greater than the theory
In 2018, Kao Yuan and others discovered through experiments that when two sheets were bent at a magic angle of 1.1 of at low temperatures, the resistance would quickly disappear and become a superconductor.
This is the new nature of the graphene material he discovered.
Theoretically, conventional superconducting objects lose superconductivity after the magnetic field exceeds a certain magnitude, and this paper finds it: superconducting three-layer magic-angle twisted graphene (MAT).
Its critical magnetic field is up to 10 tesla, which is much higher than the current theoretical model of superconductivity (approximately 2-3 times higher).
(Currently, MRI machines in general hospitals are up to 3 Tesla.)
It also proves that magic angle graphene can be a rare anti-magnetic superconducting material.
Cao Juan said that the superconductivity of the three-layer magic angle graphene could be driven by a system that could create a spin-triple state (spin-triple state) cooper pair.
In the experiment, they stacked the three layers together, and the middle layer was made of MATTG with the outer layer at 1.56; Subsequently, a large magnet parallel to graphene was used to continuously strengthen the magnetic field. Superconductivity.
Finally, I was surprised that the superconductivity of the MATTG remained strong with the increase of the surrounding magnetic field, and then disappeared, but made a return to higher field strength!
At this time, the strength of the magnetic field is as high as 10 Tesla.
This is impossible with traditional spin-single state superconductors.
For most superconductors with single spins, the two electrons in the Cooper pair have opposite spins, and the high magnetic field can easily destroy the superconductivity of this single-spin superconductor.
Cao Yuan and others believe that the three-layer graphene would be a rare spin triple superconductor.
This is because, in the spin triple state, when the superconducting material is exposed to a strong magnetic field, the energy of the two electrons in the Cooper pair will move in the same direction, i.e. the same spin.
In this way, regardless of the strength of the magnetic field, they do not separate and can be maintained without interfering with superconductivity.
Cao Yuan’s team will study the material in depth to confirm its spin status.
4 articles in the first half of the year, starting in the second half of the year
Cao Yuan, born in 1996, is 25 years old this year.
It took him only 3 years to complete the sixth grade, middle and high school courses. He scored 669 points in science in the college entrance exam.
I skipped some boring parts of middle school.
In 2010, 14-year-old Cao Yuan was enrolled in the junior class at the University of Science and Technology in China from the Shenzhen Yu Wa Experimental School and was selected as the first student of the “Yan Jiechi Physics Elite Class”. Only about 30 students are enrolled each year.
During his undergraduate studies, Cao Yuan has already done research in the laboratories of Professor Ding Sejun and Professor Zheng Chang and published related papers.
In 2014, Cao Yuan won the Guo Moro Scholarship, the highest honor for graduates from the University of Science and Technology in China, and the first New China Scholarship to be recognized by the state.
That same year, Cao Juan went to MIT to study for a PhD, and joined the team of Pablo Gerillo-Herrero, a Spanish physicist and superpower studying graphene.
He joined the Massachusetts Institute of Technology in January 2008 as an Assistant Professor of Physics. In 2018, he was promoted to full-time professor of physics.
He has won the IUPAP Award for Young Scientists in Semiconductor Physics, the Moore Prize for Quantum Materials Research (twice), and the Wolf Prize in Physics, also known as the “Nobel Wayne”. Some time ago, he won the NAS (National Academy of Sciences) Scientific Discovery Award.
The discovery of the Magic Angle graphene in 2018 began the way of Cao Yuan’s dissertation.
Cao Yuan published 3 Nature + 1 Science in the first half of this year alone. Today’s article can be considered as a prelude to his journey to publish articles in the second half of the year.
Let’s wait and see how many surprises Cao Yuan can bring.
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