November 2, 2017 11:23 AM

The behavior of the f-electrons in the lanthanides and actinides governs important macroscopic properties but their pressure and temperature dependence is not fully explored. A team from Lawrence Livermore National Laboratory and the Carnegie Institute of Washington has measured the longitudinal (cL) and transverse sound speeds (cT) vs pressure from room temperature to TC for the first time.  More....

October 6, 2017 06:03 PM

Lithium–air (Li–O2) batteries may possess energy densities close to that of gasoline. It is commonly known that the Li–O2 battery often forms insoluble discharge products, mainly oxides, which accelerate the degradation of the electrode and electrolyte, thus reducing the cycle stability and efficiency. Investigation of the stability of oxygen-rich lithium oxides would greatly extend our knowledge on improving the capability and lifetime of lithium–air batteries. More...

September 18, 2017 11:19 AM

Magnesium is the lightest structural metal, 35% lighter than aluminum and 78% lighter than steel, thus possessing an exceptional lightweightness (strength-to-weight ratio). However, because of its hexagonal close packed (hcp) structure, the associated slips in hcp-Mg often causes Mg having limited ductility and formability. A research group using the HPCAT facility has synthesized 5 nm/5 nm Mg/Nb nanocomposites that display exceptional strength, ductility, and thermal stability.  More...

August 29, 2017 12:26 PM

C, Si and Ge all have sp3-bonded crystalline phases with cubic diamond structure. Both Si and Ge display well-known sp3-bonded tetrahedral amorphous forms which have widespread applications. However, the counterpart in C, an amorphous form of diamond, has been conspicuously missing and remained a puzzle.  More....

July 17, 2017 10:34 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....