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- W2051259368 abstract "The energetically driven Ehrlich-Schwoebel barrier had been generally accepted as the primary cause of the growth instability in the form of quasiregular moundlike structures observed on the surface of thin film grown via molecular-beam epitaxy (MBE) technique. Recently the second mechanism of mound formation was proposed in terms of a topologically induced flux of particles originating from the line tension of the step edges which form the contour lines around a mound. Through large-scale simulations of MBE growth on a variety of crystalline lattice planes using limited-mobility, solid-on-solid models introduced by Wolf-Villain and Das Sarma--Tamborenea in $2+1$ dimensions, we show that there exists a topological uphill particle current with strong dependence on specific lattice crystalline structure. Without any energetically induced barriers, our simulations produce spectacular mounds very similar, in some cases, to what have been observed in many recent MBE experiments. On a lattice where these currents cease to exist, the surface appears to be scale invariant, statistically rough as predicted by the conventional continuum growth equation." @default.
- W2051259368 created "2016-06-24" @default.
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- W2051259368 date "2010-10-28" @default.
- W2051259368 modified "2023-10-16" @default.
- W2051259368 title "Growth instability due to lattice-induced topological currents in limited-mobility epitaxial growth models" @default.
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- W2051259368 doi "https://doi.org/10.1103/physreve.82.041607" @default.
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