Image Courtesy: US Department of Energy
Scientists have achieved a major breakthrough in superconductivity by creating a material that functions at the highest temperature ever recorded under normal atmospheric pressure. The advance brings researchers one step closer to developing practical superconductors that could transform energy transmission, transportation, and next-generation electronics.
The international team, led by researchers at the University of Houston, improved the performance of a copper oxide based superconductor known as Hg1223. Using a specialized pressure treatment, they increased its operating temperature to minus 122.15 degrees Celsius, nearly 20 degrees warmer than the previous ambient-pressure record set by the same material in 1993. The findings mark the highest superconducting temperature achieved without maintaining extreme pressure.
Superconductors allow electricity to flow with zero electrical resistance, eliminating energy losses that occur in conventional materials. Although some superconductors can operate at much warmer temperatures, they typically require enormous pressures that are impractical for real-world applications.
To achieve the new record, researchers compressed Hg1223 inside a diamond anvil cell at pressures reaching 30 gigapascals before rapidly releasing the force through a process known as pressure-quenching. The quick pressure release leaves behind microscopic structural defects that stabilize the material, allowing it to retain improved superconducting properties even after returning to normal pressure.
The team confirmed the material’s structure using the Advanced Photon Source at Argonne National Laboratory, where high-powered X-ray imaging revealed the changes responsible for the enhanced performance. Physicist Hua Zhou described the achievement as a significant step toward superconductors that could eventually function at room temperature and everyday pressure.
The new record does not surpass the warmest superconductor ever created. That distinction still belongs to lanthanum decahydride, which remains superconducting at about minus 13.15 degrees Celsius. However, that material only works under crushing pressures of around 190 gigapascals, making it unsuitable for practical technologies.
Researchers believe eliminating the need for extreme temperatures and pressures could eventually enable more efficient power grids, faster electric vehicle charging, advanced medical imaging systems, and even magnetic levitation technologies. While room-temperature superconductors remain a long-term goal, the latest achievement represents one of the most significant advances in the field in decades.
