American scientists develop ultra-thin superconducting field-effect transistors 1

American scientists have used independently designed and precise atomic layer by layer arrangement technology to construct an ultra-thin superconducting field-effect transistor, in order to gain insight into the environmental details of insulation materials turning into high-temperature superconductors. The breakthrough, published in the journal Nature on the same day, will enable scientists to better understand high-temperature superconductivity and accelerate the development of resistance free electronic devices.transistors

Under what circumstances does the ordinary insulating material cuprate transition from an insulating state to a superconducting state? What happens when this transition occurs? These issues have always troubled physicists. One way to explore this transition is to apply an external electric field to increase or decrease the concentration of free electrons in the material and observe its effect on the material's current carrying capacity. But to achieve this in cuprate superconductors, it is necessary to construct ultra-thin films with consistent composition and an electric field of up to 10 billion volts per meter.transistors

The Brookhaven Thin Film Research Group led by physicist Ivan Borovich from the US Department of Energy previously used molecular beam epitaxy technology to manufacture this superconducting thin film, which can precisely control the thickness of each layer when manufacturing one atomic layer at a time. They recently demonstrated that a single layer of ketone acid salt can exhibit unattenuated high-temperature superconductivity in thin films produced by molecular beam epitaxy, and they have used this method to fabricate ultra-thin superconducting field-effect transistors.