Volume 70, Number 5, June 2005
|Page(s)||635 - 641|
|Section||Condensed matter: structural, mechanical and thermal properties|
|Published online||29 April 2005|
Probing disordered substrates by imaging the adsorbate in its fluid phase
S. N. Bose National Centre for Basic Sciences, Block JD, Sector III Salt Lake, Kolkata 700 098, India
2 The Institute of Mathematical Sciences, CIT Campus Taramani, Chennai 600 113, India
Accepted: 4 April 2005
Several recent imaging experiments access the equilibrium density profiles of a monolayer of interacting particles confined to a two-dimensional substrate. When these particles are in a fluid phase, we show that such data yields precise information regarding substrate disorder as reflected in one-point functions and two-point correlations of the fluid. Using Monte Carlo simulations and replica generalizations of liquid state theories, we extract unusual two-point correlations of time-averaged density inhomogeneities induced by disorder. Correlation functions such as these have not hitherto been measured but should be experimentally accessible.
PACS: 68.43.De – Statistical mechanics of adsorbates / 61.20.-p – Structure of liquids / 79.60.Ht – Disordered structures
© EDP Sciences, 2005
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