Classification of quantum phenomena critical to high-temp superconductivity
A team of physicists led by researchers at Rice University has developed the first thermodynamic method for systematically classifying quantum phase transitions, mysterious electromagnetic transformations that are widely believed to play a critical role in high-temperature superconductivity.
The new research is described in two papers - one theoretical and one experimental - in the Aug. 8 issue of Physical Review Letters. The theoretical paper predicts that a mathematical irregularity called a divergence occurs at every "quantum critical point," a stage materials pass through as they change phases. The experimental paper reports the observation of such a divergence in the quantum critical points of two metals with very different quantum signatures.
Jade Boyd | EurekAlert!
A one-way street for light
14.11.2019 | Rheinische Friedrich-Wilhelms-Universität Bonn
TU Graz researchers develop new 3D printing for the direct production of nanostructures
14.11.2019 | Technische Universität Graz
The Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM in Dresden has succeeded in using Selective Electron Beam Melting (SEBM) to...
Carbon nanotubes (CNTs) are valuable for a wide variety of applications. Made of graphene sheets rolled into tubes 10,000 times smaller than a human hair, CNTs have an exceptional strength-to-mass ratio and excellent thermal and electrical properties. These features make them ideal for a range of applications, including supercapacitors, interconnects, adhesives, particle trapping and structural color.
New research reveals even more potential for CNTs: as a coating, they can both repel and hold water in place, a useful property for applications like printing,...
If you've ever tried to put several really strong, small cube magnets right next to each other on a magnetic board, you'll know that you just can't do it. What happens is that the magnets always arrange themselves in a column sticking out vertically from the magnetic board. Moreover, it's almost impossible to join several rows of these magnets together to form a flat surface. That's because magnets are dipolar. Equal poles repel each other, with the north pole of one magnet always attaching itself to the south pole of another and vice versa. This explains why they form a column with all the magnets aligned the same way.
Now, scientists at ETH Zurich have managed to create magnetic building blocks in the shape of cubes that - for the first time ever - can be joined together to...
Quantum-based communication and computation technologies promise unprecedented applications, such as unconditionally secure communications, ultra-precise...
In two experiments performed at the free-electron laser FLASH in Hamburg a cooperation led by physicists from the Heidelberg Max Planck Institute for Nuclear physics (MPIK) demonstrated strongly-driven nonlinear interaction of ultrashort extreme-ultraviolet (XUV) laser pulses with atoms and ions. The powerful excitation of an electron pair in helium was found to compete with the ultrafast decay, which temporarily may even lead to population inversion. Resonant transitions in doubly charged neon ions were shifted in energy, and observed by XUV-XUV pump-probe transient absorption spectroscopy.
An international team led by physicists from the MPIK reports on new results for efficient two-electron excitations in helium driven by strong and ultrashort...
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14.11.2019 | Materials Sciences
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14.11.2019 | Materials Sciences