Illustration representing ultra-thin graphene material
Photo of Science Library / Alamy
Why do thin carbon sheets offer not portrait with electric streams? The two experiments approach us with a response, and maybe even to practical superconductors.
Kin Chung Fong Another physicist was surprised at the Northeastern University of Massachusetts, Abhishek Banerjee From Harvard University, he told him a number of dinner. The different parts of the graphene were learning – carbon sheets were only one thick atom.
The past experiments have shown that two or three stacks are very cold Graphic layers can principalOr perfectly carry electricity without resistance and energy loss, if some blades rotate through a special angle. But why it happens that this was mysterious. Both physicists thought of the property calculated in dinner, called kinetic induction, can clarify the answer.
“The feeling was like you are in forest vehicles (through), and you suddenly find it, wait a good minute, I’m not the only person in this deep forest,” says Fong.
Along with other colleagues, the idea turned to two experiments. A team measured kinetic induction for two layers of accumulated and twisted graphene; A second team focused on three layers.
Joel Wang In the Massachusetts Institute of Technology, he worked in the group of two-layer graphene, says that measurement of kinetic induction was difficult for the ban. Multi-graphene can only be created in very small pieces, to produce only standard techniques for measuring supercommunitive curves – such as particles or magnetic fields – creating excessive signs. Instead, the two groups had small microwavines of low graphene flakes, researchers are slowly-slowly-slowly-slowly, they must be very low.
We know that the superfuct theater graphene connects the electrons within them, and these couples are easier to flush more than individual particles. But electrons usually scare each other. How the particles come together and these couples are still not understood with properties.
“Theory (is up and running) here is behind experiments,” he says Muu Tanaka At Tokyo University, there was also in two layers.
Two graphene Geruz, his team saw that today’s superconduct is “harder” – rather than the usual theory of superconductivity. This anomalia returned to something called quantum geometry. Specifically, the form of electron waves, which encode all possible properties and behaviors, seemed to drive this exotic type of superiducat.
In Graphene in Trilayer, the researchers found amazing similarities to the family behavior of the familiarity of the kinetic and completely superconductors of their sample – which maintain their special properties At much higher temperatures.
Therefore, yes, both Tanaka, these experiments can make more light light for graphene superconences. Physicists have searched such materials in decades, in hope that they expect them to use them radically Reduce energy consumption in many devices.
“We are finding interesting laws that emerge in both materials. Maybe what we are finding is something deeper,” Banerjee says. Both teams intend to do similar experiments with very thin superconducto.
“Recently, many new two-dimensional superconductors have been interesting, amazing and unusual”, says Zeyu HaoAt Harvard University, three-layer graphene was researching the group. For example, this month, a different group published research in two layers of crystal layers called wolframio Exhibition superconduct Layers when they twist each other’s side.
Meanwhile, a colleague Hao Mary KreidelIn the California NASA Jet propulsion lab, there is already an application for accumulated and twisted graphene. It is working on particle detectors for space missions, many of which are used by superficials. They could be smaller and lighter – a key advantage in space flight – if done with multi-graphene, he said.
