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source:physics world“Quantum spin liquids are the exception,” says Gang Chen, Professor of Physics at Fudan University in China. He is describing the theory Soviet theoretical physicist Lev Landau developed to characterize the ferromagnetic or antiferromagnetic ordering adopted by spins in a magnet when they get too cold to keep fluctuating thermally. Quantum spin liquids shirk this theory. “The spins in quantum spin liquids do not order even down to absolute zero temperature. It is a very exotic quantum phase of matter and cannot be understood in the framework by Landau.”First proposed in the...
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2024
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source: Pacific Northwest National LaboratoryThere's some irony in the fact that devices that seem indispensable to modern life—mobile phones, personal computers, and anything battery-powered—depend entirely on minerals extracted from mining, one of the most ancient of human industries. Once their usefulness is spent, we typically return these objects to the earth in landfills, by the millions.But what if we could "mine" electronic waste (e-waste), recovering the useful minerals contained within them, instead of throwing them away? A clever method of recovering valuable minerals ...
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2024
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source: University of HoustonScience is taking a step forward in the quest for superconductors that will not require ultra-high pressure to function, thanks to multinational research led by Xiaojia Chen at the University of Houston."It has long been superconductivity researchers' goal to ease or even eliminate the critical controls currently required regarding temperature and pressure," said Chen, the M.D. Anderson Professor of Physics at UH's College of Natural Sciences and Mathematics and a principal investigator at the Texas Center for Superconductivity at UH.The evolution...
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2024
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Researchers establish a high-throughput multiscale evaluation method for thermal stress in thermal barrier coatings source:phys.orgThermal barrier coatings (TBCs) are widely used in gas turbine engines to obtain elevated working temperatures and improve engine efficiency. The phase transition of the ceramic layer is accompanied by a large volume difference, causing the concentration of thermal stress, eventually leading the TBCs to fall off and fail. Therefore, it is necessary to quantitatively evaluate the magnitude and distribution of thermal stress induced by phase transition in the ce...
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2024
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