Graphene, an extremely thin two-dimensional layer of graphite used in pencils, is locked when cooled while attached to a flat surface, resulting in beautiful wrinkle patterns that can be beneficial in finding new quantum materials and superconductors, according to research led by Rutgers. Journal nature.
Quantum materials contain electrons that interact strongly with special properties, such as entangled orbits, that can provide the building blocks for super-fast quantum computers. They may also become superconductors that can reduce energy consumption by making the transmission of electricity and electronic devices more efficient.
“The warping we discovered in graphene mimics the effect of the enormous magnetic field that today̵7;s magnet technologies cannot achieve, leading to drastic changes in the electronic properties of materials” , Eva Y. Andrei, professor of the Board of Governors in the Department of Physics and Astronomy at the School of Arts and Sciences at Rutgers-New Brunswick University. “Wrapping rigid films such as graphene laminated onto flexible materials is becoming the basis for scalable electronics for many important applications, including eye-catching digital cameras. energy, skin sensors, fitness trackers like small robots and smart surgical gloves Our discovery opens the way to the development of nano-robotic control devices that will one day come to be can play a role in biological diagnostics and tissue repair. “
Scientists have studied warped graphene crystals whose properties change completely as they cool, creating fundamentally new materials with electrons that slow down, recognize each other and interact strongly, allows for gravitational phenomena such as superconductivity and magnetism to appear, according to Andrei.
Using high-tech imaging and computer simulations, the scientists showed that graphene was placed on a flat surface made of niobium diselenide, locked when cooled to 4 degrees above absolute zero. For electrons in graphene, the mountain and valley landscape created by the warping appeared like a giant magnetic field. According to Andrei, these pseudo-magnetic fields are an electronic illusion, but they act like a real magnetic field.
“Our research demonstrates that warping in 2-D materials can dramatically alter their electronic properties,” she said.
According to Andrei, the next steps include developing ways of designing warped 2-D materials with new electronic and mechanical properties that could be beneficial in nanobots and quantum computing.
The first author is Jinhai Mao, formerly a research collaborator in the Department of Physics and Astronomy and currently a researcher at the Chinese Academy of Sciences.
Physicists discovered graphene could help develop superconductors
Evidence of planar bands and correlation states in warped graphene hypercrystals, nature (Year 2020). DOI: 10.1038 / s41586-020-2567-3, www.nature.com/articles/s41586-020-2567-3
Provided by Rutgers University
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