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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.