SMRTR Science & EngineeringMay 10, 2026Interesting Engineering

Crystal smaller than a grain of sand breaks physics rules, regains superconductivity at 70 Tesla

SMRTR summary

Austrian scientists have cracked the mystery of uranium ditelluride (UTe2), a superconductor that loses its zero-resistance state at 10 Tesla but bizarrely regains it at 40–70 Tesla. By "wiggling" sand-grain-sized samples in pulsed magnetic fields, they discovered strong magnetic fluctuations act as electron "glue," enabling this rare reentrant superconductivity.

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