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- W4303982743 abstract "A sharp focus of current research on superconducting superhydrides is to raise their critical temperature Tc at moderate pressures. Here, we report a discovery of giant enhancement of Tc in CeH9 obtained via random substitution of half Ce by La, leading to equal-atomic (La,Ce)H9 alloy stabilized by maximum configurational entropy, containing the LaH9 unit that is unstable in pure compound form. The synthesized (La,Ce)H9 alloy exhibits Tc of 148-178 K in the pressure range of 97-172 GPa, representing up to 80% enhancement of Tc compared to pure CeH9 and showcasing the highest Tc at sub-megabar pressure among the known superhydrides. This work demonstrates substitutional alloying as a highly effective enabling tool for substantially enhancing Tc via atypical compositional modulation inside suitably selected host crystal. This optimal substitutional alloying approach opens a promising avenue for synthesis of high-entropy multinary superhydrides that may exhibit further increased Tc at even lower pressures." @default.
- W4303982743 created "2022-10-10" @default.
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- W4303982743 date "2022-10-10" @default.
- W4303982743 modified "2023-10-06" @default.
- W4303982743 title "Giant enhancement of superconducting critical temperature in substitutional alloy (La,Ce)H9" @default.
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- W4303982743 doi "https://doi.org/10.1038/s41467-022-33743-6" @default.
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