Electronic States of Vicinal Surfaces

Ortega, J. Enrique; Mugarza, Aitor; Schiller, Frederik; Lobo-Checa, Jorge; Corso, Martina

doi:10.1007/978-3-030-46906-1_12

Cited by 2 publications

(2 citation statements)

References 103 publications

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“…By analyzing the energy distribution curves (EDCs), weakly dispersive peaks separated by energy gaps are observed in the direction perpendicular to the steps, whereas the parallel direction exhibits the expected unconfined parabolic dispersion (Mugarza and Ortega, 2003). Overviews on vicinal surfaces were given by Mugarza and Ortega (2003) and Ortega et al (2020).…”

Section: Deg Confinement By Inorganic Atomic Steps Corrals and Superl...mentioning

confidence: 99%

Engineering quantum states and electronic landscapes through surface molecular nanoarchitectures

et al. 2022

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Surfaces are at the frontier of every known solid. They provide versatile supports for functional nanostructures and mediate essential physicochemical processes. Intimately related to two-dimensional materials, interfaces and atomically thin films often feature distinct electronic states with respect to the bulk, which is key to many relevant properties, such as catalytic activity, interfacial charge-transfer, and crystal growth mechanisms. To induce novel quantum properties via lateral scattering and confinement, reducing the surface electrons' dimensionality and spread with atomic precision is of particular interest. Both atomic manipulation and supramolecular principles provide access to custom-designed molecular assemblies and superlattices, which tailor the surface electronic landscape and influence fundamental chemical and physical properties at the nanoscale. Here the confinement of surface-state electrons is reviewed, with a focus on their interaction with molecular scaffolds created by molecular manipulation and self-assembly protocols under ultrahigh vacuum conditions. Starting with the quasifree twodimensional electron gas present at the ð111Þ-oriented surface planes of noble metals, the intriguing molecule-based structural complexity and versatility is illustrated. Surveyed are low-dimensional confining structures in the form of artificial lattices, molecular nanogratings, or quantum dot arrays, which are constructed upon an appropriate choice of their building constituents. Whenever the realized (metal-)organic networks exhibit long-range order, modified surface band structures with characteristic features emerge, inducing noteworthy physical phenomena such as discretization, quantum coupling or energy, and effective mass renormalization. Such collective electronic states can be additionally modified by positioning guest species at the voids of open nanoarchitectures. The designed scattering potential landscapes can be described with semiempirical models, bringing thus the prospect of total control over surface electron confinement and novel quantum states within reach.

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Section: Deg Confinement By Inorganic Atomic Steps Corrals and Superl...mentioning

confidence: 99%

Engineering quantum states and electronic landscapes through surface molecular nanoarchitectures

et al. 2022

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“…Detailed experimental analysis on this point has been carried out by angle-resolved photoelectron spectroscopy (ARPES) using noble metal crystals vicinal to (111), which present periodic step-terrace structures and paraboliclike Shockley surface states near the Fermi level (E F ) [2]. For narrow terraces the surface electrons are weakly affected by the steps, propagate along the average surface as coherent twodimensional (2D) superlattice states, and replicate at k ||,n = (2n−1)π/d, where n 1 is an integer number and d is the periodic interstep distance.…”

Section: Introductionmentioning

confidence: 99%

Reference plane for the electronic states in thin films on stepped surfaces

et al. 2021

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The question on whether there exists a unique photoelectron reference plane for a stepped solid surface is discussed on the basis of angle-resolved photoelectron spectroscopy data for Ag films grown on Pt(997). Different step morphologies at the surface and interface, revealed by low-energy electron diffraction measurements, result in distinctly different band dispersions of the sp-like quantum well states and of the Shockley surface state. Quantum well standing waves form between the parallel optical surface and interface planes, while the surface state follows the orientation of a local plane tilted with respect to the optical surface. These findings show the connection of the photoelectron reference plane with the local morphology of a solid surface and the spatial extent of the electron wave functions.

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Electronic States of Vicinal Surfaces

Cited by 2 publications

References 103 publications

Engineering quantum states and electronic landscapes through surface molecular nanoarchitectures

Engineering quantum states and electronic landscapes through surface molecular nanoarchitectures

Reference plane for the electronic states in thin films on stepped surfaces

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