Abstract
We study the effect of an external one-dimensional periodic field on thermodynamic anomalies associated with a two-dimensional model liquid with anisotropic interactions. The model system, a 50 : 50 binary mixture of two species of particles interacting with an angle-dependent Lennard-Jones potential, has a rich phase diagram and shows many features of network-forming liquids like water and silica such as a prominent minimum in the pressure-temperature isochore. Confining the system by a commensurate one-dimensional periodic field shifts the temperature of minimum pressure to higher temperatures. A mean-field theory of a lattice-gas in an external field which couples to internal orientational states reproduces these results.
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Mondal, C., Sengupta, S. Thermodynamic anomalies of a network former in a periodic field. Eur. Phys. J. E 36, 6 (2013). https://doi.org/10.1140/epje/i2013-13006-3
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DOI: https://doi.org/10.1140/epje/i2013-13006-3