X-ray-diffraction and electrical-transport imaging of superconducting superhydride (La,Y)H₁₀.

ABSTRACT: Understanding how microscopic structural domains govern macroscopic electronic properties is central to advancing hydride superconductors, yet such correlations remain poorly resolved under pressure. We report the synthesis and characterization of (La_0.9Y_0.1)H₁₀ superhydrides exhibiting coexisting cubic Fm3¯m and hexagonal P63/mmc clathrate phases observed over the pressure range from 168 GPa down to 136 GPa. Using synchrotron-based X-ray diffraction imaging at the upgraded Advanced Photon Source, we spatially resolved μm-scale distributions of these phases, revealing structural inhomogeneity across the sample. Four-probe resistance measurements confirmed superconductivity with two distinct transitions: an onset at 244 K associated with the cubic phase and

SUBMITTER: Manayil Marathamkottil AH 

PROVIDER: S-EPMC12714734 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature