Strange metal state discovered in hydrogen-rich compound of lanthanum under pressure

Researchers have discovered a new hydrogen-rich lanthanum compound (La₄H₂₃) with unusual superconducting properties at high pressure. This compound, showing superconductivity below -168°C at 1.2 million atmospheres, also exhibits a “strange metal” state with negative magnetoresistance, unlike typical metals. This behavior, similar to unconventional superconductors, offers new insights into electron transport and superconducting transitions in polyhydrides, potentially bridging conventional and unconventional superconductors.

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