Observation of non-superconducting phase changes in nitrogen doped lutetium hydrides.

ABSTRACT: The recent report of near-ambient superconductivity and associated color changes in pressurized nitrogen doped lutetium hydride has triggered worldwide interest and raised major questions about the nature and underlying physics of these latest claims. Here we report synthesis and characterization of high-purity nitrogen doped lutetium hydride LuH_2±xN_y. We find that pressure conditions have notable effects on Lu-N and Lu-NH chemical bonding and the color changes likely stem from pressure-induced electron redistribution of nitrogen/vacancies and interaction with the LuH₂ framework. No superconducting transition is found in all the phases at temperatures 1.8-300 K and pressures 0-38 GPa. Instead, we identify a notable temperature-induced resistance anomaly of

SUBMITTER: Xing X 

PROVIDER: S-EPMC10522599 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature