Washington, DC—Superconductivity is a rare physical state in which matter is able to conduct electricity—maintain a flow of electrons—without any resistance. This phenomenon can only be found in certain materials under specific low-temperature and high-pressure conditions.
Washington, DC, 19 June 2013--Using novel high-pressure x-ray techniques, Geophysical Laboratory scientists Li Zhang, Yue Meng (HPCAT), Wenge Yang (HPSync), and Ho-kwang Mao, along with CDAC Partner Wendy Mao (Stanford) and colleagues from the University of Chicago have obtained the very first single-crystal structure of (Mg,Fe)SiO3 postperovskite phase under high pressure corresponding to the condition in the Earth’s D′′ layer.
Washington, DC—Using revolutionary new techniques, a team led by Carnegie’s Malcolm Guthrie has made a striking discovery about how ice behaves under pressure, changing ideas that date back almost 50 years.
Washington, DC—Hydrogen is the most abundant element in the universe. The way it responds under extreme pressures and temperatures is crucial to our understanding of matter and the nature of hydrogen-rich planets.
Washington, DC— A team of researchers has made a major breakthrough in measuring the structure of nanomaterials under extremely high pressures.
Washington, DC, 21 December 2012 — Researchers from the Geophysical Laboratory have observed a new compound form of sodium and silicon - a "covalent metal," with unusual structural and electrical properties.
Washington, DC — When materials are stressed, they eventually change shape. Initially these changes are elastic, and reverse when the stress is relieved. When the material’s strength is exceeded, the changes become permanent.
Washington, DC— The mantles of Earth and other rocky planets are rich in magnesium and oxygen. Due to its simplicity, the mineral magnesium oxide is a good model for studying the nature of planetary interiors.
Washington, DC, 26 November 2012 -- The Geophysical Laboratory’s Stewart McWilliams and his team find evidence that alters our understanding of planetary evolution.
Washington, DC—Carnegie scientists are the first to discover the conditions under which nickel oxide can turn into an electricity-conducting metal.