标题： 在室温下利用量子扭转显微镜揭示石墨烯中的电子-电子相互作用 显示英文标题

标题： Revealing electron-electron interactions in graphene at room temperature with the quantum twisting microscope

摘要： 量子扭曲显微镜（QTM）是一种突破性的仪器，它通过在可扭转的范德华异质结构上进行隧穿光谱学，实现了对量子相的能量和动量分辨测量。 在本工作中，我们通过引入六方氮化硼（hBN）作为隧穿介质，显著提高了QTM的分辨率，并将其测量能力扩展到更高的能量和扭转角度。 这一进展揭示了两个单层石墨烯（MLG）片之间隧穿中以前无法探测到的色散特征，这些特征与由于电子-电子（e-e）相互作用引起的线性狄拉克色散的对数修正一致，其精细结构常数为alpha = 0.32。 值得注意的是，我们发现这种效应首次可以在室温下被解析，此时这些修正非常微弱。 我们的结果突显了QTM的卓越分辨率，通过干涉测量的层间隧穿，可以放大二维材料电子能带结构的细微变化。 我们的发现表明，即使在对称、无序的石墨烯状态中，强e-e相互作用仍然存在，并强调了QTM独特的能力，能够在广泛范围的扭曲和非扭曲系统中探测强关联基态的谱函数及其激发态。 显示英文摘要

摘要： The Quantum Twisting Microscope (QTM) is a groundbreaking instrument that enables energy- and momentum-resolved measurements of quantum phases via tunneling spectroscopy across twistable van der Waals heterostructures. In this work, we significantly enhance the QTMs resolution and extend its measurement capabilities to higher energies and twist angles by incorporating hexagonal boron nitride (hBN) as a tunneling dielectric. This advancement unveils previously inaccessible signatures of the dispersion in the tunneling between two monolayer graphene (MLG) sheets, features consistent with a logarithmic correction to the linear Dirac dispersion arising from electron-electron (e-e) interactions with a fine-structure constant of alpha = 0.32. Remarkably, we find that this effect, for the first time, can be resolved even at room temperature, where these corrections are extremely faint. Our results underscore the exceptional resolution of the QTM, which, through interferometric interlayer tunneling, can amplify even subtle modifications to the electronic band structure of two-dimensional materials. Our findings reveal that strong e-e interactions persist even in symmetric, nonordered graphene states and emphasize the QTMs unique ability to probe spectral functions and their excitations of strongly correlated ground states across a broad range of twisted and untwisted systems.