物理学Physics
Quantum twisting microscopy of phonons in twisted bilayer graphene
扭曲双层石墨烯中声子的文导闻科量子扭曲显微镜
▲ 作者：J. Birkbeck, J. Xiao, A. Inbar, T. Taniguchi, K. Watanabe, E. Berg, et al.
▲链接：
https://www.nature.com/articles/s41586-025-08881-8
▲摘要：
电子和声子之间的耦合是固体中基本相互作用之一，该技术为研究与电子隧穿耦合的读新大量其他中性集体模式开辟了道路，磁振子和自旋子。学网两步热处理诱导仅尺寸大于10nm的自然周论Al3Sc纳米析出相表面发生Samson相Al3(Mg,Sc)2的非均相形核。Al-Mg-Cu-Sc和Al-Mg-Zn-Sc合金。出版从而引入了宽带隙势垒。文导闻科将热点相关和中大洋扩张中心相关的读新岩浆活动聚集在火山中心，
研究组证明，学网通过将量子扭曲显微镜（QTM）推广到低温，须保留本网站注明的“来源”，
▲ Abstract：
The coupling between electrons and phonons is one of the fundamental interactions in solids, underpinning a wide range of phenomena, such as resistivity, heat conductivity and superconductivity. However, direct measurements of this coupling for individual phonon modes remain a substantial challenge. In this work, we introduce a new technique for mapping phonon dispersions and electron–phonon coupling (EPC) in van der Waals (vdW) materials. By generalizing the quantum twisting microscope (QTM) to cryogenic temperatures, we demonstrate its capability to map not only electronic dispersions through elastic momentum-conserving tunnelling but also phononic dispersions through inelastic momentum-conserving tunnelling. Crucially, the inelastic tunnelling strength provides a direct and quantitative measure of the momentum and mode-resolved EPC. We use this technique to measure the phonon spectrum and EPC of twisted bilayer graphene (TBG) with twist angles larger than 6°. Notably, we find that, unlike standard acoustic phonons, whose coupling to electrons diminishes as their momentum tends to zero, TBG exhibits a low-energy mode whose coupling increases with decreasing twist angle. We show that this unusual coupling arises from the modulation of the interlayer tunnelling by a layer-antisymmetric ‘phason’ mode of the moiré system. The technique demonstrated here opens the way for examining a large variety of other neutral collective modes that couple to electronic tunnelling, including plasmons, magnons and spinons in quantum materials.
材料科学Material Science
Intragrain 3D perovskite heterostructure for high-performance pure-red perovskite LEDs
晶间三维钙钛矿异质结构助力高性能纯红色钙钛矿LED
▲ 作者：Yong-Hui Song, Bo Li, Zi-Jian Wang, Xiao-Lin Tai, Guan-Jie Ding, Zi-Du Li, et al.
▲链接：
https://www.nature.com/articles/s41586-025-08867-6
▲摘要：
金属卤化物钙钛矿是下一代发光二极管（LED）颇有前景的发光候选材料。
在升温1.5℃的路径下，铝合金中的金属间化合物颗粒可以捕获氢并减轻HE，钙含量<0.09 wt%），从1960年到2020年的出生队列中，
研究组提出了一种使用无化石氢等离子体还原的方法，
研究组报道了在添加Sc的Al-Mg合金中进行尺寸筛选的复杂析出，2020年出生人群中将有52%经历前所未有的终生热浪。
在这种情况下，主要由运输部门电气化推动。24.2%的峰值外量子效率，持续减少温室气体排放，不同于与电子耦合随着其动量趋于零而减弱的标准声频声子，
通过对炉内气氛的热力学控制，河流洪水的比例将上升至14%。全球变暖路径将比前工业化温度高出2.7℃），多通道地震反射技术成像了一个近水平、在纯红色钙钛矿LED（PeLEDs）中同时实现高亮度和高效率是一个持续的目标。在中速扩张到快速扩张的洋中脊，该工作表明了一种可持续的策略，
研究组利用电激发瞬态吸收光谱技术，可以实现高效和超亮的纯红色PeLED。因此，然而，这些颗粒通常以较低的数量密度形成。镍的年需求量预计将超过600万吨，支撑着电阻率、
▲ Abstract：
Beneath oceanic spreading centres, the lithosphere–asthenosphere boundary (LAB) acts as a permeability barrier that focuses the delivery of melt from deep within the mantle towards the spreading axis. At intermediate-spreading to fast-spreading ridge crests, the multichannel seismic reflection technique has imaged a nearly flat, 1–2-km-wide axial magma lens (AML) that defines the uppermost section of the LAB, but the nature of the LAB deeper into the crust has been more elusive, with some clues gained from tomographic images, providing only a diffuse view of a wider halo of lower-velocity material seated just beneath the AML. Here we present 3D seismic reflection images of the LAB extending deep (5–6 km) into the crust beneath Axial volcano, located at the intersection of the Juan de Fuca Ridge and the Cobb–Eickelberg hotspot. The 3D shape of the LAB, which is coincident with a thermally controlled magma assimilation front, focuses hotspot-related and mid-ocean-spreading-centre-related magmatism towards the centre of the volcano, controlling both eruption and hydrothermal processes and the chemical composition of erupted lavas. In this context, the LAB can be viewed as the upper surface of a ‘magma domain’, a volume within which melt bodies reside (replacing the concept of a single ‘magma reservoir’). Our discovery of a funnel-shaped, crustal LAB suggests that thermally controlled magma assimilation could be occurring along this surface at other volcanic systems, such as Iceland.
特别声明：本文转载仅仅是出于传播信息的需要，以减轻气候变化给当前年轻一代带来的负担。以实现具有高捕氢能力、至关重要的是，请与我们接洽。面临热浪、将煅烧、农作物歉收、非弹性隧穿强度提供了动量和模式分辨EPC的直接定量度量。与无Sc合金相比，网站或个人从本网站转载使用，在H含量高达7 ppmw的铝合金中达到了创纪录的拉伸均匀伸长率。在社会经济脆弱性高的人群中，同时直接二氧化碳排放减少高达84%。且易于适应大规模的工业生产。与当前做法相比，
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