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- N G Almarza, E Lomba
- Physical review. E, Statistical, nonlinear, and…
- 2003

In this work we present an efficient procedure to evaluate effective pair potentials compatible with "experimental" distribution functions using a Monte Carlo simulation scheme. Using computer simulation results for the pair distribution functions, we have applied the method to a Lennard-Jones fluid and to a model of liquid aluminum. In both cases the… (More)

- E Lomba, N G Almarza, C Martín, C McBride
- The Journal of chemical physics
- 2007

Using computer simulations and a thermodynamically self-consistent integral equation we investigate the phase behavior and thermodynamic anomalies of a fluid composed of spherical particles interacting via a two-scale ramp potential (a hard core plus a repulsive and an attractive ramp) and the corresponding purely repulsive model. Both simulation and… (More)

- N G Almarza, J M Tavares, M M Telo da Gama
- The Journal of chemical physics
- 2011

The criticality of self-assembled rigid rods on triangular lattices is investigated using Monte Carlo simulation. We find a continuous transition between an ordered phase, where the rods are oriented along one of the three (equivalent) lattice directions, and a disordered one. We conclude that equilibrium polydispersity of the rod lengths does not affect… (More)

- N G Almarza, C Martín, E Lomba
- Physical review. E, Statistical, nonlinear, and…
- 2010

The phase behavior of confined nematogens is studied using the Lebwohl-Lasher model. For three-dimensional systems the model is known to exhibit a discontinuous nematic-isotropic phase transition, whereas the corresponding two-dimensional systems apparently show a continuous Berezinskii-Kosterlitz-Thouless-like transition. In this paper, we study the phase… (More)

- N. G. Almarza
- 2010

We present a simple lattice model which gives account of the low temperature phase equilibria of patchy particles with tetrahedral symmetry. Using such a model the phase diagram was computed as a function of the model parameters by means of Monte Carlo simulations. Depending on the details of the particle interactions a low-density ordered phase with… (More)

- J Pȩkalski, A Ciach, N G Almarza
- The Journal of chemical physics
- 2014

The short-range attraction and long-range repulsion between nanoparticles or macromolecules can lead to spontaneous pattern formation on solid surfaces, fluid interfaces, or membranes. In order to study the self-assembly in such systems we consider a triangular lattice model with nearest-neighbor attraction and third-neighbor repulsion. At the ground state… (More)

- N G Almarza
- The Journal of chemical physics
- 2009

We propose an efficient algorithm to sample the volume in Monte Carlo simulations in the isobaric-isothermal ensemble. The method is designed to be applied in the simulation of hard-core models at high density. The algorithm is based in the generation of clusters of particles. At the volume change step, the distances between pairs of particles belonging to… (More)

- Alberto Gallardo, Stefan Grandner, Noé G Almarza, Sabine H L Klapp
- The Journal of chemical physics
- 2012

Using classical density functional theory (DFT) we analyze the structure of the density profiles and solvation pressures of negatively charged colloids confined in slit pores. The considered model, which was already successfully employed to study a real colloidal (silica) suspension [S. H. L. Klapp et al., Phys. Rev. Lett. 100, 118303 (2008)], involves only… (More)

- Noé G Almarza, José A Capitán, José A Cuesta, Enrique Lomba
- The Journal of chemical physics
- 2009

Using Monte Carlo simulation and fundamental measure theory we study the phase diagram of a two-dimensional lattice gas model with a nearest neighbor hard core exclusion and a next-to-nearest neighbor finite repulsive interaction. The model presents two competing ranges of interaction and, in common with many experimental systems, exhibits a low density… (More)

- Alejandra I Guerrero, Daniel A Stariolo, Noé G Almarza
- Physical review. E, Statistical, nonlinear, and…
- 2015

The J(1)-J(2) Ising model in the square lattice in the presence of an external field is studied by two approaches: the cluster variation method (CVM) and Monte Carlo simulations. The use of the CVM in the square approximation leads to the presence of a new equilibrium phase, not previously reported for this model: an Ising-nematic phase, which shows… (More)