The British "Nature" magazine issued two consecutive physics papers, which reported new insights from MIT scientists about the behavior of unconventional superconducting materials. This finding caused a sensation in the industry, which is called the major factor of graphene superconductivity. Progress. Such materials have been puzzling physicists for decades, and the latest discoveries have helped to develop high-temperature superconducting materials for making powerful magnets or developing low-power electronic technologies.
According to the superconductivity theory of 1957, some materials can conduct electricity with zero resistance. However, many materials exhibit so-called unconventional superconductivity and cannot be explained by this theory.
This time, MIT scientists Pablo Garilolet Herrera and colleagues found that when two layers of graphene are twisted together at a 'magical angle', they show unconventional superconductivity. In other words, the research team found a new electronic state in the two-layer graphene, which can easily achieve the transition from insulator to superconductor, and its properties are similar to the high-temperature superconductivity of copper oxide (its structure is often difficult to adjust).
This "magic angle" of graphene in addition to the formation of superconductivity - from the strong attraction between the electrons to produce zero resistance, will form another electronic state. In the second paper, the team showed The twisted double-layered graphene system shows a new insulating state, the Mott Insulator, which appears to be driven by powerful interactions between electrons.
The systems reported in the two papers can be easily adjusted by changing the torsion angle and the electric field. This means that the results will provide a new two-dimensional platform for scientists to understand the high-temperature superconductivity that has long plagued the physics community. The issue of origin will open a door for the study of unconventional superconductors and also pave the way for the development and engineering of new electrical properties.
