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Fe/Cu(311)


LEED pattern

LEED: Cu/Fe(311)


9 ML Fe/Cu(311), (00) spot

Fe/Cu(311) is a highly asymmetrical heteroepitaxial growth system. The surface symmetry of the growth front is characterized by the uniaxial arrangement of close-packed Fe atom rows. Dominant stress along these rows has considerable impact on the film morphology and leads to a periodically faceting of the film. In this way, an anisotropic surface topography is achieved which resembles an up-and-down staircase. It shows up in an anisotropic broadening of LEED spots for out-of-phase scattering conditions. Shape and energy-dependent variation of the spot profiles give throughout information on the periodic length of the faceted surface, on the inclination angle of facets and on the number of layers contributing to the growth front.


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