This article reviews mainly the use of the diamond anvil cell (DAC) for ultrahigh-pressure
generation (a few hundred GPa) and the various techniques employed in studying 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 …

A determination of the ruby high-pressure scale is presented using all available appropriate
measurements including our own. Calibration data extend to 150 GPa⁠. A careful …

The insulator-metal transition in hydrogen is one of the most outstanding problems in
condensed-matter physics. The high-pressure metallic phase is now predicted to be liquid …

We have compressed xenon in a diamond-anvil cell to approximately 200 GPa. The
metallization of xenon by band-gap closure was investigated by obtaining optical data in …

The first-order Raman spectrum of diamond has been measured in a diamond-anvil cell up
to 27 GPa. The fundamental phonon line varies linearly in pressure with a shift of 2.87 cm …

We have measured the pressure shifts of the ruby R lines and several surrounding lines to
156 GPa in a quasihydrostatic xenon pressure medium. We fit these lines to a cubic crystal …

The insulator to metal transition in solid hydrogen was predicted over 70 years ago but the
demonstration of this transition remains a scientific challenge. In this regard, a peak in the …

We use pulsed-laser heating of hydrogen at static pressures in the megabar pressure region
to search for the plasma phase transition to liquid atomic metallic hydrogen. We heat our …

Direct electrical transport measurements in a diamond anvil cell provide evidence for the
metallization of cesium iodide (CsI) at a pressure of 115 gigapascals. A drop in the …