We provide a direct experimental proof and the related modeling of the role played by Si overgrowth in promoting the lateral ordering of Ge islands grown by chemical vapor deposition on Si(001). The deposition of silicon induces a shape transformation, from domes to truncated pyramids with a larger base, generating an array of closely spaced interacting islands. By modeling, we show that the resulting gradient in the chemical potential across the island should be the driving force for a selective flow of both Ge and Si atoms at the surface and, in turn, to a real motion of the dots, favoring the lateral order.

Capellini, G., DE SETA, M., Evangelisti, F., Zinovyev, V.a., Vastola, G., Montalenti, F., et al. (2006). Self-ordering of a Ge island single layer induced by Si overgrowth. PHYSICAL REVIEW LETTERS, 96(10), 106102-106102_4 [10.1103/PhysRevLett.96.106102].

Self-ordering of a Ge island single layer induced by Si overgrowth

DE SETA, Monica;
2006-01-01

Abstract

We provide a direct experimental proof and the related modeling of the role played by Si overgrowth in promoting the lateral ordering of Ge islands grown by chemical vapor deposition on Si(001). The deposition of silicon induces a shape transformation, from domes to truncated pyramids with a larger base, generating an array of closely spaced interacting islands. By modeling, we show that the resulting gradient in the chemical potential across the island should be the driving force for a selective flow of both Ge and Si atoms at the surface and, in turn, to a real motion of the dots, favoring the lateral order.
2006
Capellini, G., DE SETA, M., Evangelisti, F., Zinovyev, V.a., Vastola, G., Montalenti, F., et al. (2006). Self-ordering of a Ge island single layer induced by Si overgrowth. PHYSICAL REVIEW LETTERS, 96(10), 106102-106102_4 [10.1103/PhysRevLett.96.106102].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/119919
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