Alkaline earth-induced formation of periodic islands on semiconductor surfaces

Formation of ordered alkaline earth silicides and germanides are required for growth of crystalline oxides on these materials with perfectly abrupt interfaces. A nanoscale and atomic scale picture of how these structures form has been lacking. We find that the alkaline earth etches Ge away from single height steps creating germanide islands that self-organize on the surface.

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Thursday, December 12, 2013