Research

I investigate the (microscopic) exotic properties of matter under extreme conditions, mostly high pressure.

With my collaborators, we are interested in topics such as:

• Dynamical disorder in crystalline solids
  (Ranieri et al. Nature Comm. 2017; Rescigno et al. Nature 2025)

• Molecular diffusion in compressed fluids
  (Ranieri et al. Nature Comm. 2021; Ranieri et al. Nature Comm. 2024)

• Reactivity and polymorphism in simple model systems
  (Koller et al. Angew. Chem. 2024; Ranieri et al. JACS 2025)

• Pressure–temperature phase diagram of small molecules
  (Laniel et al. Nature Comm. 2023; Ranieri et al. Comm. Chemistry 2024)

• Synthesis and structural characterization of new compounds
  (Ranieri et al. Phys. Rev. Lett. 2022; Ranieri et al. Phys. Rev. Materials 2026)

• Water and clathrates, hydrogen bonding
  (Schaack et al. PNAS 2019; Ranieri et al. PNAS 2023)

• Quantum transitions of confined H₂, nuclear quantum effects
  (Ranieri et al. J. Phys. Chem. C 2019; Ranieri et al. J. Chem. Phys. 2024)

I am frequently using large-scale facilities for my experiments, including synchrotrons and neutron sources. I am also very interested in developing new methodologies for pushing the boundaries of experimental techniques.