Formation trends of ordered self-assembled nanoislands on stepped substrates

The growth of ordered self-assembled nanoislands on stepped substrates is studied systematically by kinetic Monte Carlo simulations. As the terrace width is small, the formation of nanoislands is confined in the steps and nanoislands ordered in lines or nanowires can be obtained. The Schwoebel barrier at the step edges has a great influence on the evolution of both the size and space distributions of the islands. When the terrace width is relatively large, self-ordering of nanoislands in the center regions of the terraces happens. An unexpected trend of the nanoisland self-ordering is found as the deposition thickness is larger than 0.2 ML, which can be related to the attractive migrations between nearby islands.

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Made available in DSpace on 2010-11-14T14:26:13Z (GMT). No. of bitstreams: 1 Formation trends of ordered self-assembled nanoislands on stepped substrates.pdf: 480435 bytes, checksum: 15984719c8cd4120f6a69349bc1512c6 (MD5) Previous issue date: 2010

This work was supported by the National Natural Science Foundation of China (Grant Nos. 60706009, 90401025, 60736036, 60777021, and 60476009).

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This work was supported by the National Natural Science Foundation of China (Grant Nos. 60706009, 90401025, 60736036, 60777021, and 60476009).