In the Quiet Cold of the Laboratory: When a Century-Long Superconductivity Record Finally Yielded

In laboratories where the air hums with cooling systems and instruments glow faintly in the half-light, physicists continue a quiet conversation with matter itself. It is a dialogue that has unfolded for more than a century—since the first moment in 1911 when scientists discovered that, under deep cold, certain materials allow electricity to pass without resistance, as though friction had simply vanished from the world.

The phenomenon came to be known as superconductivity, and it has remained one of physics’ most enduring puzzles. Each decade has carried the same quiet question forward: how warm can such perfect conductors become before the delicate order inside them dissolves?

Recently, that question moved a little closer to its answer.

Researchers at the University of Houston and the Texas Center for Superconductivity have reported a new record for superconductivity at ordinary atmospheric pressure. In their experiments, a mercury-based copper-oxide material reached a superconducting transition temperature of 151 kelvin, or about −122°C, the highest temperature ever achieved for a superconductor that does not require extreme pressure to maintain its properties.

For physicists who have followed the field for decades, the number carries particular weight. The previous ambient-pressure record—133 kelvin, achieved in 1993 using a related compound—had remained unbroken for more than thirty years. The new result raises that mark by roughly 18 degrees, a modest shift on paper yet symbolically significant in a field where progress is often measured in small steps.

The research team reached this threshold through a method known as pressure quenching. In this approach, a material is first compressed under intense pressure to alter its internal structure and enhance superconducting behavior. While still under those conditions, it is cooled and then the pressure is released rapidly, effectively locking in the improved state so that the material continues to function as a superconductor under normal atmospheric pressure.

Such techniques matter because many of the highest superconducting temperatures ever observed have required crushing pressures—millions of times stronger than Earth’s atmosphere—conditions that limit practical use. By contrast, superconductors stable at ordinary pressure can be studied more easily and potentially developed into real technologies.

The stakes are considerable. When electricity flows through conventional wires, a portion of the energy is lost as heat. Superconductors eliminate that loss entirely. If materials capable of operating at higher temperatures become practical, they could reshape electrical grids, magnetic resonance imaging systems, high-speed electronics, and even experimental fusion reactors.

Yet the road ahead remains long. Room-temperature superconductivity—around 300 kelvin, or roughly 27°C—still lies far beyond the new record. Even so, physicists view the latest result as a reminder that the path forward may not depend solely on discovering entirely new materials, but also on learning how to stabilize unusual states of matter that appear only under pressure.

The study describing the 151-kelvin superconducting transition was published in March 2026 in the Proceedings of the National Academy of Sciences. The research was conducted by physicists including Ching-Wu Chu and Liangzi Deng at the University of Houston’s Texas Center for Superconductivity.

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Sources

Science News University of Houston Proceedings of the National Academy of Sciences The Quantum Insider AcademicJobs Research News