Laser speckle analysis resolves mesoscale transitions
September 23, 2014 — An elegant experimental approach, which requires only simple and widely available equipment, provides previously inaccessible spatial and temporal resolution on coexisting electronic domains in a technologically promising transition-metal oxide.
Double-Magic Nature of 132Sn and 208Pb
August 27, 2014 —
Reference: Phys. Rev. Lett.
Chemical and Morphological Changes of High Voltage Lithium-Manganese Rich Cathodes with Cycling
August 26, 2014 — Researchers used full-field transmission X-ray microscopy (TXM), capable of 3D imaging at high spatial resolution over a field of view of about 30×30×30 μm, to study the mechanisms driving structural degradation and voltage fade in a high capacity cathode material with nominal composition Li1.2Mn0.525Ni0.175Co0.1O2.
Direct observation of ferroelectric field effect and oxygen vacancy screening at ferroelectric–metal interface
August 21, 2014 — Scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS) studies of ferroelectric–metal interfaces revealed two distinct polarization charge screening mechanisms, with oxygen vacancies compensating negative charge and electrons compensating positive charge.
Magnetic fluctuations are good for superconductivity
August 15, 2014 — Atomic scale measurements of the strength of the magnetic fluctuations in a series of iron-based superconductors were made using high- resolution electron spectroscopy. Surprisingly, the superconducting transition temperature was higher when the magnitude of the fluctuating iron magnetic moment or “spin” was larger.