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Strongly anisotropic roughness in surfaces driven by an oblique particle flux
Physical Review E (2006)
  • Beate Schmittmann, Virginia Polytechnic Institute and State University
  • Gunner Pruessner
  • Hans-Karl Janssen

Using field theoretic renormalization, an MBE-type growth process with an obliquely incident influx of atoms is examined. The projection of the beam on the substrate plane selects a “parallel” direction, with rotational invariance restricted to the transverse directions. Depending on the behavior of an effective anisotropic surface tension, a line of second-order transitions is identified, as well as a line of potentially first-order transitions, joined by a multicritical point. Near the second-order transitions and the multicritical point, the surface roughness is strongly anisotropic. Four different roughness exponents are introduced and computed, describing the surface in different directions, in real or momentum space. The results presented challenge an earlier study of the multicritical point.

Publication Date
May 15, 2006
Publisher Statement
Copyright 2006 American Physical Society. Posted with permission.
Citation Information
Beate Schmittmann, Gunner Pruessner and Hans-Karl Janssen. "Strongly anisotropic roughness in surfaces driven by an oblique particle flux" Physical Review E Vol. 73 (2006)
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