Researchers have established that a particularly stable form of WTe2 is a two-dimensional topological insulator, confirming recent predictions. The findings should provide new opportunities for fundamental studies of topological phenomena and for next-generation spintronic applications. Read more »
All News & Updates
Guillaume Freychet, Physicist Postdoctoral Fellow
Guillaume Freychet is a postdoctoral fellow at ALS Beamlines 7.3.3 and 11.0.1.2, the small- and wide-angle x-ray scattering (SAXS/WAXS /GISAXS) beamlines. His research is focused on the development of algorithms and data treatments for various scattering techniques. Read more »
Berkeley Lab and SLAC Host Hard X-Ray Photoemission Conference
Earlier this month, Berkeley Lab and SLAC hosted the 7th International Conference on Hard X-Ray Photoelectron Spectroscopy (HAXPES). This biennial meeting has grown from a small workshop held at ESRF in 2003 with about 50 participants, to a truly international event, which this year attracted 150 participants from 20 countries. Read more »
Carolyn Larabell to Receive Shirley Award at ALS User Meeting
Carolyn Larabell, Director of the National Center for X-Ray Tomography (NCXT), centered around ALS Beamline 2.1, has been selected by the ALS Users’ Executive Committee to receive the 2017 David A. Shirley Award for Outstanding Scientific Achievement at the ALS. Read more »
ALS Work Highlighted in DOE Top 40 Countdown
To celebrate DOE’s 40th anniversary (October 1, 2017), the Office of Science (SC) collected 40 scientific milestones from the previous 40 years, each one supported by SC. The ALS played a key role in two of the milestones: 2005 (ribosome) and 2009 (topological materials). Read more »
Electrical Switching of Magnetic Vortex Circulation
Photoemission electron microscopy (PEEM) experiments have demonstrated that the circulation direction of a magnetic vortex can be switched by the application of an electric field, opening the door to digital devices with more streamlined system designs, improved performance, and greater energy efficiency. Read more »
New Study on Graphene-Wrapped Nanocrystals Makes Inroads Toward Next-Gen Fuel Cells
A powdery mix of metal nanocrystals wrapped in single-layer sheets of carbon atoms shows promise for safely storing hydrogen for use with fuel cells for passenger vehicles and other uses. Now, a new study provides insight into the atomic details of the crystals’ ultrathin coating and how it serves as selective shielding while enhancing their performance in hydrogen storage. Read more »
Elucidating the mechanism of MgB2 initial hydrogenation via a combined experimental–theoretical study
Magnesium borohydride Mg(BH4)2 is a promising solid-state hydrogen-storage material, releasing 14.9 wt% hydrogen upon conversion to MgB2. Although several dehydrogenation pathways have been proposed, the hydrogenation process is less well understood. This study elucidates the key atomistic mechanisms associated with the initial stages of hydrogen uptake within MgB2. Read more »
The Mystery of the Lightweight Electrons
Copper oxides are important for superconductivity applications but are difficult to understand due to complex charge, spin, and orbital interactions. Now, studies at the ALS have found such a system in which observations of effective electron mass are at odds with state-of-the-art electronic-structure calculations. Read more »
Amorphous calcium carbonate particles form coral skeletons
Skeletons of Stylophora pistillata corals form by the attachment of amorphous calcium carbonate precursor particles, formed within the coral tissue, to the coral skeleton surface. This mechanism is faster than the precipitation of ions from solution and may render the corals less susceptible to ocean acidification than previously assumed. Read more »
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