When it comes to sleuthing in science, few are better than the intrepid investigators at the National Institute of Standards and Technology (NIST). For example, take the "Case of the Stray Electrons."
NIST researchers have created nanoscale devices that manipulate electrons in order to count them one at a time. Such counting is critical to the development of new fundamental electrical standards. When two electrons are bound in pairs (called Cooper pairs) in a superconductor, they can be manipulated much faster, providing larger currents that can be measured more accurately. Manipulation of Cooper pairs also is important in several schemes to develop quantum computers. Past attempts at manipulation, however, have been thwarted by the existence of a small number of unpaired electrons rambling around in the superconducting state. Avoiding these unpaired electrons is the mystery that NIST is now helping solve.
NIST researchers have uncovered an important clue by showing that a previously unappreciated factor has a strong effect on the number of unpaired electrons in Cooper pair devices. Electron counting devices are made from two layers of aluminum, where the strengths of the bonds pairing electrons in each layer can be different. This slight difference originally was thought to be unimportant. However, a study of more than a dozen devices in which this difference was varied in a controlled way and independently measured in each device, shows the difference does affect device performance directly.
Fred McGehan | EurekAlert!
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Heavy construction machinery is the focus of Oak Ridge National Laboratory’s latest advance in additive manufacturing research. With industry partners and university students, ORNL researchers are designing and producing the world’s first 3D printed excavator, a prototype that will leverage large-scale AM technologies and explore the feasibility of printing with metal alloys.
Increasing the size and speed of metal-based 3D printing techniques, using low-cost alloys like steel and aluminum, could create new industrial applications...
Friction stir welding is a still-young and thus often unfamiliar pressure welding process for joining flat components and semi-finished components made of light metals.
Scientists at the University of Stuttgart have now developed two new process variants that will considerably expand the areas of application for friction stir welding.
Technologie-Lizenz-Büro (TLB) GmbH supports the University of Stuttgart in patenting and marketing its innovations.
Friction stir welding is a still-young and thus often unfamiliar pressure welding process for joining flat components and semi-finished components made of...
Optical quantum computers can revolutionize computer technology. A team of researchers led by scientists from Münster University and KIT now succeeded in putting a quantum optical experimental set-up onto a chip. In doing so, they have met one of the requirements for making it possible to use photonic circuits for optical quantum computers.
Optical quantum computers are what people are pinning their hopes on for tomorrow’s computer technology – whether for tap-proof data encryption, ultrafast...
The Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP has been developing various applications for OLED microdisplays based on organic semiconductors. By integrating the capabilities of an image sensor directly into the microdisplay, eye movements can be recorded by the smart glasses and utilized for guidance and control functions, as one example. The new design will be debuted at Augmented World Expo Europe (AWE) in Berlin at Booth B25, October 18th – 19th.
“Augmented-reality” and “wearables” have become terms we encounter almost daily. Both can make daily life a little simpler and provide valuable assistance for...
With the help of artificial intelligence, chemists from the University of Basel in Switzerland have computed the characteristics of about two million crystals made up of four chemical elements. The researchers were able to identify 90 previously unknown thermodynamically stable crystals that can be regarded as new materials. They report on their findings in the scientific journal Physical Review Letters.
Elpasolite is a glassy, transparent, shiny and soft mineral with a cubic crystal structure. First discovered in El Paso County (Colorado, USA), it can also be...
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29.09.2016 | Event News
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30.09.2016 | Materials Sciences
30.09.2016 | Earth Sciences
30.09.2016 | Life Sciences