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 by Staff Writers Dresden, Germany (SPX) Oct 10, 2018
However, electric currents in solids are formed by electrons. In metals, the electrons do not collide with each other, but they scatter with lattice defects. In conventional materials, the movement of electrons is therefore more akin to the motion of balls in a pinball machine. Hydrodynamic electron flow can only be observed in high-purity quantum materials. An international team of members from the IBM Research Laboratory Zurich, the University of Hamburg and the Max Planck Institute for Chemical Physics of Solids has now found signatures of electron hydrodynamics in the semimetal tungsten diphosphide. The results were published in the journal Nature Communications. On closer inspection, it could be shown that the hydrodynamic behavior of the electrons is rooted in the strongly interacting quantum nature of the electron system. In addition, it is surprising that these observations are consistent with mathematical techniques derived from string theory. These techniques have been used to describe strongly interacting forms of quantum matter and predict that the conversion of any form of energy into thermal energy is fundamentally limited by quantum mechanics. The experiments were made possible by the progress in the development of new materials and nanofabrication techniques.
Single atoms break carbon's strongest bond Upton NY (SPX) Oct 04, 2018 An international team of scientists including researchers at Yale University and the U.S. Department of Energy's (DOE) Brookhaven National Laboratory have developed a new catalyst for breaking carbon-fluorine bonds, one of the strongest chemical bonds known. The discovery, published on Sept. 10 in ACS Catalysis, is a breakthrough for efforts in environmental remediation and chemical synthesis. "We aimed to develop a technology that could degrade polyfluoroalkyl substances (PFAS), one of the most c ... read more
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