ケンブリッジ大学の研究者らは、分子振動によって駆動される電子が太陽光材料の境界をわずか18フェムト秒で横断するのを観測した。この発見は、太陽エネルギーシステムにおける電荷移動の伝統的な理論に挑戦するものである。これらの知見は、より効率的な光収穫技術を設計する新しい方法を示唆している。
ケンブリッジ大学の科学者らは、実験により電子が自然プロセスの限界に近い速度で太陽光材料を横断できることを明らかにした。18フェムト秒—1秒の1京分の1—にわたるテストで、研究者らは単一の分子振動中に電荷が分離するのを観察した。この超高速移動は、従来のルールでは性能が悪いはずのシステムで起こり、ポリマー供与体がエネルギー差が小さく相互作用が弱い非フラーレン受容体に隣接した構成だった。
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Physicists at MIT have developed a new microscope using terahertz light to directly observe hidden quantum vibrations inside a superconducting material for the first time. The device compresses terahertz light to overcome its wavelength limitations, revealing frictionless electron flows in BSCCO. This breakthrough could advance understanding of superconductivity and terahertz-based communications.
Researchers at EPFL have developed a method to measure the duration of ultrafast quantum events without using an external clock. By analyzing electron spin changes during photoemission, they found that transition times vary significantly based on a material's atomic structure. Simpler structures lead to longer delays, ranging from 26 to over 200 attoseconds.
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For the first time, researchers have demonstrated light behaving like the quantum hall effect, a phenomenon previously observed only in electrons. Photons now drift sideways in quantized steps determined by fundamental constants. This breakthrough could enhance precision measurements and advance quantum photonic technologies.
Researchers in Australia have developed and tested what is described as the world's first proof-of-concept quantum battery, which charges faster as it scales up. Led by CSIRO in partnership with the University of Melbourne and RMIT, the prototype leverages quantum mechanics for rapid energy absorption. Findings were published in Light: Science & Applications.
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Researchers at BESSY II have experimentally verified that self-assembled phosphorus chains on a silver surface exhibit truly one-dimensional electronic properties. By separating signals from chains aligned in different directions, the team revealed each chain's distinct one-dimensional electron structure. The findings suggest that increasing chain density could shift the material from semiconductor to metal behavior.
Researchers at the University of Texas at Austin have observed a sequence of exotic magnetic phases in an ultrathin material, validating a theoretical model from the 1970s. The experiment involved cooling nickel phosphorus trisulfide to low temperatures, revealing swirling magnetic vortices and a subsequent ordered state. This discovery could inform future nanoscale magnetic technologies.
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Researchers in China have demonstrated heat flowing from cold to hot in a quantum system, potentially requiring updates to the second law of thermodynamics. Using a molecule as qubits, the team manipulated quantum information to achieve this reversal. The finding highlights differences between classical and quantum physics.