The structural transformation of CoSn2 at low temperature

The aim of the proposal is to investigate the structural properties of the compound CoSn2 at the long and local scale by means of high resolution X-ray powder diffraction (XRPD) and pair distribution function (PDF) analyses, from room temperature down to 5 K. This compound exhibits a discontinuity in the resistivity curve around 25 K. Such a feature seems related to a structural transition, suggested by the Fermi surface map for ab cleaved plane at 20 K, obtained from ARPES. Hence, we aim to reveal if CoSn2 undergoes a structural transition at low temperatures by analyzing its structural properties using both high-resolution XRPD and pair distribution function analysis. At this scope, we ask 3 shifts at the ID22 beamline.