University of Houston Researchers Set New Ambient-Pressure Superconductivity Record
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Physicists at the University of Houston have achieved a new record for superconductivity at ambient pressure, reaching a transition temperature of 151 Kelvin (approximately minus 122 degrees Celsius). This is the highest temperature ever reported for a superconductor operating without applied pressure since the phenomenon's discovery in 1911. The breakthrough, published in the Proceedings of the National Academy of Sciences, was achieved using a process called pressure quenching.
Facts First
- Set a new ambient-pressure superconductivity record at 151 Kelvin (minus 122°C).
- Achieved the highest transition temperature (Tc) ever reported for a superconductor at ambient pressure.
- Used a process called pressure quenching to enhance and preserve superconducting properties.
- Breaks a 30-year record held by a mercury-based ceramic that reached 133 K.
- Research was funded by Intellectual Ventures, the state of Texas, and foundations and published in PNAS.
What Happened
Researchers from the University of Houston's Texas Center for Superconductivity (TcSUH) and physics department set a new record for superconductivity under ambient pressure conditions. Physicists Ching-Wu Chu and Liangzi Deng achieved a superconducting transition temperature (Tc) of 151 Kelvin, which is the highest Tc ever reported for a superconductor functioning at ambient pressure since 1911. The team used a process called pressure quenching to enhance superconducting behavior and preserve it at ambient pressure. The findings were published in the Proceedings of the National Academy of Sciences (PNAS).
Why this Matters to You
Superconductors that operate at higher temperatures and without extreme pressure could one day lead to more efficient power grids. Currently, electricity transmission loses approximately 8% of electricity. Most superconductors require extremely low temperatures and expensive cooling systems, but progress toward higher operating temperatures may eventually reduce these costs and energy losses. This research represents a step toward that goal, though room temperature superconductivity (approximately 300 K) remains a significant scientific challenge.
What's Next
The researchers have contributed to a companion perspective paper, also published in PNAS, that discusses six approaches to raising superconducting temperatures, including pressure quenching. This suggests the scientific community is actively exploring multiple pathways to achieve higher-temperature superconductivity. Further research may build on this record to push the operational temperature closer to practical, room-temperature applications.