Research paper on On Cu(111), Au(100), and Pd(111) Substrates, Resonant Charge-Transfer in Grazing Collisions of H with Vicinal Nanosurfaces: A Comparative Study

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Title: On Cu(111), Au(100), and Pd(111) Substrates, Resonant Charge-Transfer in Grazing Collisions of H with Vicinal Nanosurfaces: A Comparative Study

Abstract: With vicinal nanosteps, we compare the electron dynamics at monocrystalline Cu(111), Au(100), and Pd(111) precursor substrates. Resonant charge transfer (RCT) occurs between a surface and a passing H ion at grazing angles to fill the unoccupied bands of a surface superlattice. The active electron’s motion is simulated using a quantum mechanical wave packet propagation approach, and the dynamics of the superlattice are seen using time-evolved wave packet densities. In general, the survived ion fraction in the reflected beam exhibits modulations as a function of the size of the vicinal terrace and exhibits peaks at energies that access the image state subband dispersions. Based on the selection of two ion trajectories, differences in ion-survival magnitudes are examined as a function of the particular substrate choice and the ion-surface interaction time. The energies of the maxima in the ion survival probability for all the metals taken into consideration are explained by a square well model that generates standing waves between the steps on the surface. This shows that the fundamental mechanism causing confinement-induced subband formation is reliable. The research may encourage shallow-angle ion-scattering spectroscopy measurements and applications to access electronic substructures in periodically nanostructured surfaces.

Keywords: resonant charge transfer; nanosurface; superlattice band structure; wave packet propagation; ion-surface; ion survival

Paper Quality: SCOPUS / Web of Science Level Research Paper

Subject: Physics

Subject Category: Atomic and Molecular Physics, and Optics

Writer Experience: 20+ Years

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