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It's an interesting article just published in Nature:
https://www.nature.com/articles/d41586-018-07848-2
https://www.nature.com/articles/d41586-018-07848-2
Graphene stacked at 1.1 degrees refers to a specific arrangement of layers of graphene, a thin sheet of carbon atoms, at a specific angle of 1.1 degrees. This arrangement has been found to exhibit superconductivity, meaning it can conduct electricity with zero resistance at low temperatures.
The specific arrangement of graphene layers at 1.1 degrees creates a moiré pattern, which leads to the formation of a flat band in the electronic structure. This flat band allows for the pairing of electrons, leading to superconductivity at low temperatures.
The discovery of superconductivity in graphene stacked at 1.1 degrees has potential applications in various fields, including quantum computing, high-speed electronics, and energy storage. It could also lead to the development of more efficient and powerful electronic devices.
The superconductivity in graphene stacked at 1.1 degrees is unique because it occurs at relatively high temperatures (around -50 degrees Celsius) compared to other superconductors. It also has the potential for tunability, meaning the superconducting state can be switched on and off by adjusting the angle between the graphene layers.
One of the main challenges is maintaining the precise angle of 1.1 degrees between the graphene layers, as any deviation can significantly affect the superconducting properties. Additionally, the production of large, high-quality graphene samples with this specific arrangement is still a technical challenge that needs to be overcome for practical applications.