AI 中文总结
该研究开发了结合DFT、TB、SCTMA无序平均与实验的迭代方法，将其应用于金插层石墨烯，成功重现了金团簇相ARPES的关键特征，明确了杂化与局域散射势为核心微观要素。
AI 中文摘要
插层可强烈改变宿主材料的电子色散，角分辨光电子能谱（ARPES）可直接揭示这一点。我们开发了一种通用迭代方法，结合密度泛函理论（DFT）、紧束缚（TB）、自洽T矩阵近似（SCTMA）框架下的无序平均及实验数据，以构建插层体系的有效模型。DFT确定相关微观自由度并约束选定的模型参数，而SCTMA计算与实验的对比则指导这些参数的进一步优化。我们将该方法应用于金团簇插层石墨烯，结果表明它能重现金团簇相ARPES的主要特征，包括V₁₂范霍夫奇点的展宽以及色散中类扭折特征的出现。分析确定的关键微观要素是选定插层轨道与石墨烯态的杂化，以及插层诱导的局域散射势。
英文摘要
Intercalation can strongly modify the electronic dispersion of a host material, as directly revealed by angle-resolved photoemission spectroscopy (ARPES). We develop a general iterative method combining density functional theory (DFT), tight-binding (TB), disorder averaging within the self-consistent T-matrix approximation (SCTMA), and experiment, to construct an effective model of the intercalated system. DFT identifies the relevant microscopic degrees of freedom and constrains selected model parameters, while comparison of SCTMA calculations with experiment guides their further refinement. We apply this method to graphene intercalated with Au clusters and show that it reproduces the main ARPES signatures of the Au-cluster phase, including the broadening of the V12an Hove singularity and the emergence of kink-like features in the dispersion. The essential microscopic ingredients identified by the analysis are the hybridization between selected intercalant orbitals and the graphene states, together with an intercalation-induced local scattering potential.
Comments12 pages, 8 figures
