Elastic electron scattering in quantum corrals: The importance of the shape of the adatom potential

Details Elastic electron scattering in quantum corrals: The importance of the shape of the adatom potential Elastic electron scattering in quantum corrals: The importance of the shape of the adatom potential

2004-01-26

arxiv.org/abs/cond-mat/0401512v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.70.233409

We report elastic scattering theory for surface electron waves in quantum corrals defined by adatoms on the surface of noble metals. We develop a scattering-matrix technique that allows us to account for a realistic smooth potential profile of the scattering centers. Our calculations reproduce quantitatively all the experimental observations, which is in contrast to previous theories (treating the adatoms as point scatterers) that require additional inelastic channels of scattering into the bulk in order to achieve the agreement with the experiment. Our findings thus indicate that surface states are not coupled to the bulk electrons.

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