Extended Data Fig. 2: Spatial studies of diamagnetism in S1.
From: Imaging the Meissner effect in hydride superconductors using quantum sensors
(a) We measure the local suppression in Bz along a line cut shown in the confocal fluorescence scan of sample S1. The slope s = ΔBz/ΔHz for this study is presented in maintext Fig. 3(g). (b) We show plots of the extracted Bz against the applied external field Hz at fifteen spatial points (indexed) along the line cut. Linear fits to the extracted values of Bz show a clear suppression in two regions of the sample (enclosed in dotted yellow line in (a)). (c) Schematic geometry we assumed for estimating the CeH9 sample’s diamagnetic properties. We assume a spherical chunk of CeH9 of radius R with NV centers located at a distance r from the center (directly below the sample). Under the application of an external field Hz along the NV axis, our ODMR measurements yield a suppression factor corresponding to the slope s = dBz/dHz.
