Fig. 1: Lanthanum and hydrogen signals before and after laser heating above approximately 1500 K at 170 GPa.
From: Diffusion-driven transient hydrogenation in metal superhydrides at extreme conditions
Left Sharp resonances of both LaH3 and LaH10.5(4) indicate the absence of significant electric field gradients at the La-sites, in agreement with diffraction methods and ab-initio DFT calculations26,28. Right While the 1H-NMR resonances of the hydrogen spin sub-system in LaH3 are predominantly broadened by direct homo-nuclear dipole couplings, we found the corresponding resonances after laser heating to be significantly sharper, indicating enhanced hydrogen mobility33. Carrier frequencies f0 were 55.95 MHz and 395 MHz for 139La and 1H respectively. For more information, see methods section. Spectra taken prior to laser heating are in blue, after laser heating in purple.
