Dresden 2011 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 42: Critical Phenomena and Phase Transitions
DY 42.9: Talk
Friday, March 18, 2011, 12:15–12:30, ZEU 255
Critical Casimir forces in the presence of a chemically structured substrate — •Francesco Parisen Toldin1 and Siegfried Dietrich2,3 — 1Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Str. 38, D-01187 Dresden, Germany — 2Max-Planck-Institut für Metallforschung, Heisenbergstr. 3, D-70569 Stuttgart, Germany — 3Institut für Theoretische und Angewandte Physik, Universität Stuttgart, Pfaffenwaldring 57, D-70569 Stuttgart, Germany
Motivated by recent experiments on a binary liquid mixture, we study the critical properties of a system in the Ising universality class, in a film geometry in the presence of a chemically structured substrate, with alternating adsorption preference. By means of Monte Carlo simulations of an improved Hamiltonian, so that the leading scaling corrections are suppressed, numerical integration, and finite-size scaling analysis we determine the critical Casimir force and its universal scaling function.