under pressure*

Materials containing gold have been seldom explored since gold is a very inert element forming relatively few compounds. In this work, we investigated the mineral sylvanite, AuAgTe₄, under compression using first-principles calculations and found a structural phase transition from monoclinic P2/c to P2/m structure around 5 GPa (in agreement with X-ray diffraction and Raman results). We further examined the superconducting properties of the P2/m phase using the EPW package and identified that the main contribution to the electron-phonon coupling arises from the low-energy phonon modes.