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Semi-metal surfaces: A new territory for helium atom scattering measurements

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The study of semimetal surfaces including those of various topological insulators represents a new wide territory of investigation for helium atom scattering. Owing to the nature of the He-surface scattering process, inelastic scattering intensities convey direct information on the electron-phonon (e-p) coupling strength of these surfaces. As a consequence of the e-p coupling helium scattering can observe subsurface phonon modes which can even be localized several layers beneath the surface.

This talk is part of the Surfaces, Microstructure and Fracture Group series.

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