Penn State Scientists Edge Closer to Room-Temperature Superconductors
A research team at Penn State has developed a powerful new model that may bring the dream of room-temperature superconductors closer to reality. By merging classical superconductivity theory with quantum mechanics through a concept called zentropy theory, scientists have created a method to predict materials capable of conducting electricity with zero resistance at higher temperatures.
Superconductors, materials that allow electricity to flow without energy loss, have long promised to revolutionize energy and computing technologies. The challenge is that most known superconductors work only at extremely cold temperatures — often hundreds of degrees below freezing — making them impractical for large-scale use.
Led by Professor Zi-Kui Liu from Penn State’s Department of Materials Science and Engineering, the team designed a computational approach that connects two key frameworks: Bardeen-Cooper-Schrieffer (BCS) theory, which explains how electron pairs (known as Cooper pairs) move without resistance at low temperatures, and density functional theory (DFT), a quantum tool for modeling electron behavior.
“Understanding how superconductivity happens is essential before we can design materials that sustain it at higher temperatures,” said Liu. “Our goal is to unify the physics so that we can predict and guide discovery rather than rely on trial and error.”
The new zentropy theory acts as a bridge between the microscopic quantum world and macroscopic material behavior. It links electronic structure with temperature-dependent properties, helping researchers determine when a material transitions between superconducting and normal states.
By using this model, the team was able to explain superconducting behavior in both conventional and high-temperature materials, even predicting possible superconductivity in metals like copper, silver, and gold — elements not typically considered candidates for the phenomenon.
Zentropy theory also provides a way to estimate the critical temperature at which a material stops being superconducting, potentially helping scientists identify compounds that can operate closer to room temperature.
The researchers plan to extend their work by studying how pressure influences superconductivity and by screening millions of materials in global databases to find promising new candidates.
“If successful, this framework could lead to materials that make lossless power grids, ultra-efficient electronics, and magnetic levitation systems possible — even at room temperature,” Liu said.
The study, published in Superconductor Science and Technology, was supported by the U.S. Department of Energy’s Theory of Condensed Matter program.
Co-investigator:
Shun-Li Shang, Research Professor of Materials Science and Engineering, Penn State
The work marks a major step toward solving one of physics’ most enduring mysteries — how to make superconductivity practical for real-world use.
