Researchers investigated the topological insulator bismuth selenide by spin-resolved photoelectron spectroscopy. They found an astonishing difference depending on whether it is illuminated by circularly polarized light in the vacuum ultraviolet and in the ultraviolet spectral range. This result could help explaining how spin currents can be generated in topological insulators.
New research aimed to improve the mechanical properties of poly(ether imide). Poly(ether imide) is a polymer that has very good mechanical and thermal properties and is used, among other things, to produce the internal parts of aircraft.