26ème Congrès Général de la SFP

Long-range dynamic perylene ordering on Ag(110)

Non programmé

20m

Centre des Congrès de la Villette (Cité des sciences et de l'Industrie, Paris)

Poster MC19 Hétérostructures et interfaces de basse dimensionnalité Session Poster 1: MC3, MC5, MC6, MC11, MC13, MC15, MC16, MC18, MC19, MC25, REDP, posters hors MC

Orateur

Dr Laurent Guillemot (ISMO, CNRS)

Description

We present a room temperature STM study of dynamics of the quasi-liquid perylene monolayer formed on Ag(110) under thermal equilibrium. We observe that the thermodynamic balance of the molecule-molecule and molecule-substrate interactions generate a compact two-dimensional (2D) quasi-liquid state established by the mobile perylene molecules dynamically distributed into three distinct motion modes. The substrate provides memory to the intermingled molecules and eliminates ergodicity of the quasi-liquid state. Fourier transform of the topographies unravels the long-range spatial correlations and epitaxial character of the quasi-liquid state. Analysis of the molecularly resolved motion modes in real space indicates that the substrate force field induces the dynamical ergodic – non-ergodic phase transition which gives rise to the stationary long-range ordered (-1 2.5 3 2) quasi-liquid state.