4 papers
New Methods for Investigating Superconductivity at Very High Pressures
Viktor V. Struzhkin, Yuri A. Timofeev, Eugene Gregoryanz +2
We review recent advances in diamond anvil cell development, focusing on the details of magnetic susceptibility techniques. We have developed and implemented highly sensitive techn…
Raman Scattering of Metals to Very High Pressures
Alexander F. Goncharov, Eugene Gregoryanz, Viktor V. Struzhkin +4
We review recent development in Raman techniques and diamond anvil cell technology, that allow measurements of Raman of metals in the megabar pressure range. The Raman technique in…
New Phases of Solid Nitrogen
Eugene Gregoryanz, Alexander Goncharov, Russell J. Hemley +3
We report the discovery of a new class of molecular phases of solid nitrogen at high pressures and temperatures by Raman and infrared spectroscopy and powder x-ray diffraction. Unl…
Pressure Dependence of the Raman Spectrum, Lattice Parameters and Superconducting Critical Temperature of MgB2
A. F. Goncharov, V. V. Struzhkin, E. Gregoryanz +6
We have observed a strongly broadened Raman band of MgB2 that shows anomalously large pressure dependence of its frequency. This band and its pressure dependence can be interpreted…