Fig. 1: Structural characterization of LaRhGe3.
a Rietveld refinement of the powder X-ray diffraction pattern of LaRhGe3 measured at room temperature. The Bragg peak positions for the I4mm space group are indicated by the gray crosses. A small germanium impurity (1.3% by weight) peak is marked with an orange asterisk. b The non-centrosymmetric body-centered tetragonal crystal structure of LaRhGe3, where La is shown in green, Rh in red, and the two Ge sites are shown in purple and blue, respectively. The broken inversion symmetry is most easily appreciated by considering the positions of Rh within the unit cell. c Scanning electron microscopy image of a single crystal of LaRhGe3 (top left) and elemental mapping on the same crystal for La (top right), Rh (bottom left), and Ge (bottom right). Intensity of colors in the elemental mapping corresponds to the intensity of peaks related to each element, showing uniform distribution of the elements across the crystal.
