Designing materials with advanced functionalities is the main focus of contemporary solid-
state physics and chemistry. Research efforts worldwide are funneled into a few high-end …

Pressure has long been recognized as a fundamental thermodynamic variable but its
application was previously limited by the available pressure vessels and probes. The …

Synchrotron sources with high photon flux, small source size, and broad energy range have
revolutionized ultrafine characterization of condensed matter. With the addition of the …

Producing metallic hydrogen has been a great challenge in condensed matter physics.
Metallic hydrogen may be a room-temperature superconductor and metastable when the …

The most well-known example of an ordered quantum state—superconductivity—is caused
by the formation and condensation of pairs of electrons. Fundamentally, what distinguishes …

Hydrogen and helium are the most abundant elements in the Universe. They are also, in
principle, the most simple. Nonetheless, they display remarkable properties under extreme …

Metal hydrides are of inestimable importance for the future of hydrogen energy. This unique
monograph presents a clear and comprehensive description of the bulk properties of the …

High pressure promotes the formation of polyhydrides with unusually high hydrogen-to-
metal ratios. These polyhydrides have complex hydrogenic sublattices. We synthesized iron …

Molecular hydrogen is expected to exhibit metallic properties under megabar pressures.
This metal is predicted to be superconducting with a very high critical temperature, T c, of …

Recently, the theoretically predicted lanthanum superhydride, LaH 10±δ, with a clathrate-
like structure was successfully synthesized and found to exhibit a record high …