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Formation and destruction of the heavy-electron ground state in U compounds with AuBe5 crystal structure
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https://doi.org/10.1103/physrevb.35.1452Abstract
The strong influence of changes of the chemical composition on the formation of a heavy-electron ground state is demonstrated in uranium intermetallic compounds crystallizing in the cubic AuBe5 structure. The most spectacular effect is the large enhancement of the low-temperature electronic specific heat in UPt5 when one Pt atom per formula unit is replaced by Au. UAuPt4 may be a heavy-electron superconductor.
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