Berlin 2005 – wissenschaftliches Programm
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DY: Dynamik und Statistische Physik
DY 50: Critical Phenomena and Phase Transitions
DY 50.7: Vortrag
Mittwoch, 9. März 2005, 11:30–11:45, TU H3010
Profile and Width of Rough Interfaces — •Melanie Müller1 and Gernot Münster2 — 1Max-Planck-Institut für Kolloide und Grenzflächen, 14421 Potsdam — 2Institut für Theoretische Physik, Universität Münster, Wilhelm-Klemm-Str. 9, 48149 Münster
In the context of Landau theory and its field theoretical refinements, interfaces between coexisting phases are described by intrinsic profiles. These intrinsic interface profiles, however, are neither directly accessible by experiment nor by computer simulation as they are broadened by long-wavelength capillary waves. We apply a blocking procedure, using the block size as a variable cutoff, to separate the small scale intrinsic structure from the large scale capillary wave fluctuations in the Monte Carlo simulated 3D-Ising model. While the capillary wave picture is confirmed on large length scales and its limit of validity is estimated, an intrinsic regime is, contrary to expectations, not observed.