A Stanford team announced that it has created the world's first dipolar quantum fermionic gas from the metal dysprosium. The team heated particles in a crucible to around 1,300 degrees Celsius and shot them into a powerful vacuum. Using a continuous-wave blue laser, the particles were then cooled to within a thousandth of a degree of absolute zero. Subsequent lasers and an … [Read more...]
Researchers Improve Infrared Detectors
A team of researchers from Peking University, the Chinese Academy of Sciences, and Duke University is harnessing the remarkable properties of single-walled carbon nanotubes (SWNTs) to create highly sensitive, “uncooled” photovoltaic infrared detectors. This new type of detector may prove useful for industrial, military, manufacturing, optical communications, and scientific … [Read more...]
Small Bumps in “Semiconductor Billiards” Have Unexpectedly Large Effect
There’s nothing worse than a pool table with an unseen groove or bump that sends your shot off course: a new study has found that the same goes at the nano-scale, where the “billiard balls” are tiny electrons moving across a “table” made of the semiconductor gallium arsenide. In a research paper titled “The Impact of Small-Angle Scattering on Ballistic Transport in Quantum … [Read more...]
X-Ray Diffraction Reveals 3D Mechanics of Germanium-Crystal Arrays
Scientists at the European Synchrotron Radiation Facility (ESRF) are using X-ray diffraction to thoroughly understand a new type of nanostructure -- square arrays of germanium (Ge) pillars that have very complex geometries and physical attributes. Germanium grown epitaxially on micrometre-sized silicon pillars forms perfect crystals free of defects. The resulting Ge/Si … [Read more...]
Researchers Use Cold Atoms to Simulate Graphene
Scientists at ETH Zurich used a set of laser beams to create a honeycomb-like structure similar to that found in graphene. By loading ultracold atoms into this optical lattice, they can simulate electronic properties of this promising material. Such experiments may be used to identify electronic properties of materials which have yet to be discovered. Tilman Esslinger, … [Read more...]
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