June 26th, 2015
Superconductivity is a rare physical state in which matter is able to conduct electricity - maintain a flow of electrons - without any resistance. It can only be found in certain materials, and even then it can only be achieved at very low temperatures and often only at high pressure. New research from Carnegie’s Elissaios Stavrou,...
April 23rd, 2015
New work from Carnegie EFree scientists Russell Hemley and Ivan Naumov hones in on the physics underlying the recently discovered fact that some metals stop being metallic under pressure. Metals are compounds that are capable of conducting the flow of electrons that make up an electric current. Other materials, called insulators, are not...
March 19th, 2015
Over 50 years ago Russian physicist Sergey M. Stishov synthesized a new dense tetragonal form of SiO2 at high pressure for the first time. This same mineral was later found in a sample from the Barringer Meteor Crater and was named stishovite in his honor. To date, experimental studies have led to the conclusion that stishovite...
February 10th, 2015
Carbon exists in a variety of structural motifs as a result of its ability to adopt sp-, sp2-, and sp3-type bonding modes. Graphite, diamond, and lonsdaleite (hexagonal diamond) are well-established allotropic forms of carbon, but in recent years fullerenes, nanotubes, graphene and even amorphous carbon have received a increasing...
February 10th, 2015
Natural gas is a significant component of the US energy economy, but in order for its potential to be realized in the transportation sector, the challenges of on-board natural gas storage need to be addressed. Natural gas liquefaction is an energy-intensive and expensive cryogenic process, and attaining viable energy densities by...
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