HEPS-ID33: a Platform for Studies on Electronic Structure and Lattice Vibrations of Matter Under High Pressure

Pressure can not only alter interatomic distances within materials, but also manipulate electronic structure to induce exotic phases emerging with unique physical properties. Uncovering the evolution of atomic and electronic structures of matters under high pressure is of utmost importance in physical sciences. This article introduces three state-of-the-art X-ray scattering spectroscopies, namely, X-ray Raman scattering (XRS), Nuclear Resonant Vibrational scattering (NRVS), and Resonant Inelastic X-ray Scattering (RIXS). These scattering spectroscopies can be explored to provide key information including electronic structures, phonon density of states, orbital and spin excitations, etc, which are of great value in high-pressure studies. At the 4th generation High Energy Photon Source (HEPS), the hard X-ray high energy resolution spectroscopy beamline is constructed and dedicated to such scattering spectroscopies. It is envisaged the suite of scattering spectroscopies will help the advancement of high-pressure researches world widely.