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We investigate the dominant phonon wavevectors q* and the associated dominant phonon‐assisted electronic transitions implied by the 2D Raman mode of graphene by combining ab initio calculations with a full two‐dimensional integration over the graphene Brillouin zone. We find that q* are highly anisotropic and rotate with the polarizer:analyzer condition, providing access to the entire angular extent...
In this work we investigate the vibrational properties of atomic oxygen on Ag(210) in a mixed on-surface+sub-surface adsorption configuration using density-functional perturbation theory. In particular, we consider a geometry in which oxygen decorates the steps and an additional O species is located in an octahedral sub-surface site just below an Ag step atom. This structure presents a mode at 55meV...
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