Ion scattering from 2D structures: pursuing the monolayer resolution

CIC nanoGUNE Seminars

Speaker

Miguel Ángel Muñoz. Instituto de Ciencia de Materiales de Sevilla CSIC, Sevilla, Spain

When

2009/11/09
10:30

Place

nanoGUNE seminar room, Tolosa Hiribidea 76, Donostia - San Sebastian

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ABSTRACT Medium energy ion scattering (MEIS) is a surface analysis technique with a huge potential in surface structure determination and high resolution depth profiling. Along with other analysis techniques, for instance low energy electron diffraction (LEED), it has provided an answer to open questions in surface science such as the extent of the adsorbate induced pseudo-(100) reconstruction of the Cu(111) surface. In our attempt to improve the technique depth resolution, 2D model systems like Y-Si(111), have been studied in a combined theoretical and experimental investigation which finally led to a direct observation of a trajectory dependent electronic energy-loss of the incident ions and a subsequent reformulation of the energy-loss process along the short scattering trajectory in the solid.