The local structure and valence electronic states in superconducting TrZr2 (Tr = transition metals) high entropy alloys

Recent discovery of superconducting high entropy alloys has stimulated several experimental studies with a new hope for the applications of superconductivity. In general, the configuration entropy in these superconductors induces robustness of the superconducting state, however it is still to be explored the cause of this peculiar robustness. In this proposal, we plan to study the local structure of superconducting TrZr2-type (Tr = transition metal) high entropy alloys using temperature dependent x-ray absorption fine structure measurements. The results are expected to provide important information on the correlation between the local disorder and superconductivity for controlling applications oriented properties of these materials.