AI 中文总结
研究强关联电子材料中，利用扫描隧道显微镜的非弹性电子隧穿，研究PdCrO₂的Pd端表面局域模式动力学，驱动振动激发偏离平衡，发现氢簇中振动激发寿命更长，光谱数据揭示非平衡效应，理论计算支持与衬底性质有关。
AI 中文摘要
强关联电子材料的性质对小晶格畸变表现出惊人的敏感性，这为通过选择性畸变驱动来调控它们提供了机会，通常通过光激发实现。利用扫描隧道显微镜中的非弹性电子隧穿，通过研究铜铁矿氧化物PdCrO₂的Pd端表面上的局域模式动力学，我们证明在强关联电子材料表面可以驱动振动激发偏离平衡。该表面在氢吸附时形成不同大小和形状的氢簇镶嵌。我们的发现表明，簇中的振动激发比典型金属表面具有更长的寿命。对光谱数据的详细分析揭示了激发中非平衡效应的特征，我们将其归因于这些模式的延长寿命。理论计算支持激发的长寿命性质与衬底的独特性质有关。
英文摘要
The properties of strongly correlated electron materials exhibit a surprising sensitivity to small lattice distortions, providing an opportunity for their tuning by selective distortion driving, usually achieved by optical excitations. Using inelastic electron tunneling in scanning tunneling microscopy, we demonstrate that at the surface of a strongly correlated electron material, we can drive vibrational excitations out of equilibrium, by studying the dynamics of localized modes on the Pd-terminated surface of the delafossite oxide PdCrO2. This surface forms a tiling of hydrogen clusters of varying sizes and shapes upon hydrogen adsorption. Our findings reveal that vibrational excitations in the clusters exhibit longer lifetimes than on typical metal surfaces. Detailed analysis of the spectroscopy data reveals signatures of non-equilibrium effects in the excitations which we attribute to the extended lifetimes of these modes. Theoretical calculations support that the long-lived nature of the excitations is related to the unique properties of the substrate.
Comments22 pages, 4 figures
