July 17, 2017 11:34 AM

The interplay of magnetism and superconductivity in iron-based superconductors remains a subject of extensive studies. Recently, pressure induced superconductivity was observed in Fe-ladder compound BaFe2S3, a quasi-one-dimensional prototype of iron-based superconductors. More....

June 26, 2017 04:52 PM

Accurate pressure scales remain a challenging subject in compression science.  In order to intercalibrate the equations of state (EOSs) of the three widely used pressure standards, gold, platinum, and MgO, a research group has measured their unit cell volumes using the laser-heated diamond anvil cell up to 140 GPa and 2500 K.   More...

June 23, 2017 06:58 PM

For decades it has been believed that lithium, the simplest metallic element, has a complicated ground-state crystal structure. Using synchrotron x-ray diffraction at HPCAT and multiscale simulations with density functional theory and molecular dynamics, a research group has shown that the previously accepted martensitic ground state is metastable. More...

June 9, 2017 07:28 PM

Carbon gives rise to remarkable classes of materials with combined properties, such as low weight, high strength, hardness, elasticity, and tunable electronic properties, because of the flexibility to form sp-, sp2-, and sp3-hybridized bonds. A research team succeeded to recover an ultrastrong carbon after compressing glassy carbon at various pressure and temperature conditions.  More...

April 17, 2017 05:42 PM

Zirconium has a low neutron cross section and high degree of corrosion resistance. It is widely used in industry and engineering, in particular in the area of refractory applications. Knowledge of elastic and thermal properties of zirconium is important for understanding the behavior and performance of the materials at extreme conditions. By combining X-ray diffraction and X-ray imaging techniques, together with ultrasonic wave velocity measurements, in a Paris-Edinburgh press at HPCAT, a research team has determined multiple elastic and thermal properties including bulk modulus, shear modulus, Poisson’s ratio, and Debye temperature at high pressure and high temperature conditions.    More...