arXiv 2608.18885cond-mat.mes-hall

石墨烯中取代式Mn的共振缺陷散射的光谱指纹

Spectral Fingerprints of Resonant Defect Scattering by Substitutional Mn in Graphene

Ahmed Samir Lotfy, Zviadi Zarkua, Renan Villarreal, Rikkie Joris, Muhammad Saad, Koen van Stiphout, Karina Landivar, Steven Brems, Giovanni Di Santo, Aleksandr … 展开作者

Ahmed Samir Lotfy, Zviadi Zarkua, Renan Villarreal, Rikkie Joris, Muhammad Saad, Koen van Stiphout, Karina Landivar, Steven Brems, Giovanni Di Santo, Aleksandr Seliverstov, Simona Achilli, Luca Petaccia, Lino M. C. Pereira

首次发表 2026-08-20

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中文总结 AI 辅助

研究以石墨烯/Cu(111)的取代式Mn为模型点缺陷，结合STM与ARPES验证共振散射指纹，确定Mn为强共振散射体，建立了表征石墨烯共振无序的有效方法。

中文摘要 AI 辅助

以石墨烯/Cu(111)中的取代式Mn作为模型点缺陷，我们结合扫描隧道显微镜（STM）与角分辨光电子能谱（ARPES）对预测的共振散射指纹进行验证。当Mn浓度升至0.44%时，狄拉克点展宽达到0.52 eV，而动量展宽与能量无关。这些光谱指纹将取代式Mn归类为强共振散射体，并确立STM与ARPES的组合是识别和表征石墨烯中共振无序的有力方法。

英文摘要

Using substitutional Mn in graphene/Cu(111) as a model point defect, we combine scanning tunneling microscopy (STM) and angle-resolved photoemission spectroscopy (ARPES) to test the predicted fingerprints of resonant scattering. As the Mn concentration increases to 0.44%, the Dirac point stretching reaches 0.52 eV, while momentum broadening remains energy independent. These spectral fingerprints classify substitutional Mn as a strong resonant scatterer and establish the combination of STM and ARPES as a powerful approach to identify and characterize resonant disorder in graphene.