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arXiv 2603.05030physics.opticscond-mat.mtrl-sci
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实空间等离子成像揭示了单分子层金的修改电子结构

Real-Space Plasmon Imaging Reveals Modified Electronic Structure of Gold at the Monolayer Limit

CIC nanoGUNE BRTA;Chalmers University of Technology(查尔姆斯理工大学);Linköping University(林雪平大学);Max Planck Institute for Solid State Research(马克斯·普朗克固体研究所);MAX IV Laboratory, Lund University(隆德大学 MAX IV 实验室);Donostia International Physics Center(圣塞巴斯蒂安国际物理中心);IKERBASQUE, Basque Foundation for Science(伊卡巴斯基克,巴斯克科学基金会);Facultad de Ciencias Químicas, Universidad del País Vasco UPV-EHU(巴斯克国立大学 UPV-EHU 理学院化学系);Department of Electricity and Electronics, University of the Basque Country (UPV/EHU)(巴斯克国立大学 (UPV/EHU) 电力与电子工程系)
Andrei Bylinkin, Philippe Roelli, Naveen Shetty, Rositsa Yakimova, Ulrich Starke, Camilla Coletti, Stiven Forti, Alexei Zakharov, Vyacheslav M. Silkin, Samuel L… 展开作者

Andrei Bylinkin, Philippe Roelli, Naveen Shetty, Rositsa Yakimova, Ulrich Starke, Camilla Coletti, Stiven Forti, Alexei Zakharov, Vyacheslav M. Silkin, Samuel Lara-Avila, Rainer Hillenbrand

AI总结:

通过实空间等离子成像揭示单分子层金的电子结构,发现其等离子体极化子特性及Drude模型参数,证实其作为二维金属的特性。

摘要:

原子薄材料表现出与三维对应物不同的电子和光学性质。对于金属,特别是金,单层研究仍 largely 未被探索,由于制备和表征的挑战。在这里,我们报道了首个对稳定准自由站立金单层的光学研究,该单层由金插入石墨烯和SiC之间形成。中红外纳米成像揭示出波长几乎比自由空间光小一个数量级的等离子体极化子。使用Drude模型分析其色散关系,得出弛豫时间τ=18 fs,与 bulk 金相当,以及Drude权重D=1.3 mS·eV,接近 bulk 预期值的两倍。这些结果确立了单层金作为二维金属,为纳米尺度光子学、等离子体学和超薄电子学提供了机会。

英文摘要:

Atomically thin materials exhibit electronic and optical properties distinct from their three-dimensional counterparts. For metals, particularly gold, monolayer studies remain largely unexplored due to fabrication and characterisation challenges. Here we report the first optical study of a stable quasi-freestanding gold monolayer formed by Au intercalation between graphene and SiC. Mid-infrared nanoimaging reveals plasmon-polaritons with wavelengths nearly an order of magnitude shorter than free-space light. Analysis of their dispersion using a Drude model yields a relaxation time of $τ= 18\,$fs, comparable to bulk gold, and a Drude weight of $D = 1.3\,$mS$\cdot$eV, nearly twice the bulk expectation. These results establish monolayer gold as a two-dimensional metal, opening opportunities for nanoscale photonics, plasmonics and ultra-thin electronics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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