Professor Yang Fan's team from the School of Physics at Beijing Institute of Technology, in collaboration with other researchers, has recently proposed an innovative theoretical approach to achieve high-temperature superconductivity at liquid nitrogen temperatures under ambient pressure.

This comes in response to the challenge posed by nickel-based bilayer perovskite material La3Ni2O7, which exhibits superconductivity beyond liquid nitrogen temperatures under high pressure, thus limiting its research and application potential.

The team suggests applying a vertical electric field to monolayer and bilayer La3Ni2O7 films, which could potentially induce high-temperature superconductivity at ambient pressure. Their approach combines strong coupling theoretical studies of both simplified single-orbital and complete two-orbital models, systematically demonstrating the physical feasibility of this method.

This work introduces a new physical mechanism for achieving liquid nitrogen temperature superconductivity without relying on high pressure, offering a promising new direction for high-temperature superconductor research.

The study has gained attention from notable figures such as Ashvin Vishwanath, a tenured professor at Harvard University and a member of the National Academy of Sciences in the United States.

The findings have been published in the prestigious journal Nature Communications (Nat. Commun. 17:1120(2026)).