106 citations · 1.2k across the 62 of their papers we have counts for
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Biaxial nematics and nematic-nematic demixing in polydisperse mixtures of hard board-like particle fluids
Yuri Martinez-Raton, Daniel de las Heras, Enrique Velasco
We study the bulk phase behavior of a polydisperse liquid crystal fluid made of biaxial boards with restricted orientations using both fundamental measure theory and Monte Carlo co…
Sedimentation profiles and phase stacking diagrams in polydisperse hard rounded rectangle fluids
Tobias Eckert, Daniel de las Heras, Enrique Velasco +1
We analyze the sedimentation behavior of a polydisperse two-dimensional liquid-crystal fluid using a local density functional theory based on scaled particle theory. Polydispersity…
Defects in vibrated monolayers of equilateral triangular prisms
Jorge Vega, Enrique Velasco, Yuri Martinez-Raton
We present experimental results in which a quasimonolayer of grains, shaped as equilateral triangular prisms, is vertically vibrated within circular and square confining cavities.…
Cell theories for the chiral crystal phase of hard equilateral triangles
Yuri Martinez-Raton, Enrique Velasco
We derive several versions of the cell theory for a crystal phase of hard equilateral triangles. To that purpose we analytically calculated the free area of a frozen oriented or fr…
Density-functional theory for clustering of two-dimensional hard particle fluids
Yuri Martinez-Raton, Enrique Velasco
Fluids made of two-dimensional hard particles with polygonal shapes may stabilize symmetries which do not result directly from the particle shape. This is due to the formation of c…
Prediction of the liquid-crystal phase behavior of hard right triangles from fourth-virial density-functional theories
Enrique Velasco, Yuri Martinez-Raton
We have used an extended Scaled-Particle Theory that incorporates four-body correlations through the fourth-order virial coefficient to analyse the orientational properties of a fl…
Exotic liquid crystalline phases in monolayers of vertically vibrated granular particles
Yuri Martinez-Raton, Enrique Velasco
Vibrated monolayers of granular particles confined into horizontal cavities form a variety of fluid patterns with orientational order that resemble equilibrium liquid-crystal phase…
The effect of combined roundness and polydispersity on the phase behavior of hard-rectangle fluids
Yuri Martinez-Raton, Enrique Velasco
We introduce a model for a fluid of polydisperse rounded hard rectangles where the length and width of the rectangular core are fixed, while the roundness is taken into account by…
Effect of clustering on the orientational properties of a fluid of hard right isosceles triangles
Yuri Martinez-Raton, Enrique Velasco
Recent studies have shown the fluid of hard right triangles to possess fourfold and quasi-eightfold (octatic) orientational symmetries. However, the standard density-functional the…
Failure of standard density functional theory to describe the phase behavior of a fluid of hard right isosceles triangles
Yuri Martinez-Raton, Enrique Velasco
A fluid of hard right isosceles triangles was studied using an extension of Scaled-Particle Density-Functional Theory which includes the exact third virial coefficient. We show tha…
Orientational ordering in a fluid of hard kites: A density-functional-theory study
Yuri Martínez-Ratón, Enrique Velasco
Using Density Functional Theory we theoretically study the orientational properties of uniform phases of hard kites -- two isosceles triangles joined by their common base. Two appr…
Domain walls in vertically vibrated monolayers of cylinders confined in annuli
Ariel Díaz-De Armas, Martín Maza-Cuello, Yuri Martínez-Ratón +1
Liquid-crystalline ordering in vertically vibrated granular monolayers confined in annuli of different sizes is examined. The annuli consist of circular cavities with a central cir…
Highly confined mixtures of parallel hard squares: A Density Functional Theory study
Yuri Martinez-Raton, Enrique Velasco
Using the Fundamental-Measure Density Functional Theory, we have studied theoretically the phase behavior of extremely confined mixtures of parallel hard squares in slit geometry.…
Defects in vertically vibrated monolayers of cylinders
Miguel Gonzalez-Pinto, Johannes Renner, Daniel de las Heras +2
We analyse liquid-crystalline ordering in vertically vibrated monolayers of cylinders confined in a circular cavity. Short cylinders form tetratic arrangements with C symmetry.…
Positional ordering of hard adsorbate particles in tubular nanopores
Péter Gurin, Szabolcs Varga, Yuri Martínez-Ratón +1
The phase behaviour and structural properties of a monolayer of hard particles is examined in such a confinement, where the adsorbed particles are constrained to the surface of a n…
Uniform phases in fluids of hard isosceles triangles: one component and binary mixtures
Yuri Martinez-Raton, Ariel Diaz-De Armas, Enrique Velasco
We formulate the scaled particle theory for a general mixture of hard isosceles triangles and calculate different phase diagrams for the one-component fluid and for certain binary…
Dynamical properties of heterogeneous nucleation of parallel hard squares
Miguel Gonzalez-Pinto, Yuri Martinez-Raton, Enrique Velasco
We use the Dynamic Density-Functional Formalism and the Fundamental Measure Theory as applied to a fluid of parallel hard squares to study the dynamics of heterogeneous growth of n…
Ordering of hard rectangles in strong confinement
Peter Gurin, Szabolcs Varga, Miguel Gonzalez-Pinto +2
Using transfer operator and fundamental measure theories, we examine the structural and thermodynamic properties of hard rectangles confined between two parallel hard walls. The si…
Role of length-polydispersity on the phase behavior of freely-rotating hard-rectangle fluid
Ariel Diaz-De Armas, Yuri Martinez-Raton
We used the Density Functional formalism, in particular the Scaled Particle Theory, applied to a length-polydisperse hard-rectangular fluid to study its phase behavior as a functio…
Clustering in vibrated monolayers of granular rods
Miguel Gonzalez-Pinto, Florentino Borondo, Yuri Martinez-Raton +1
We investigate the ordering properties of vertically-vibrated monolayers of granular cylinders in a circular container at high packing fraction. In line with previous works by othe…
Biaxial nematic phase stability and demixing behaviour in monolayers of rod-plate mixtures
Yuri Martinez-Raton, Miguel Gonzalez-Pinto, Enrique Velasco
We theoretically study the phase behaviour of monolayers of hard rod-plate mixtures using a fundamental-measure density functional in the restricted-orientation (Zwanzig) approxima…
Phase behaviour and correlations of parallel hard squares: From highly confined to bulk systems
Miguel Gonzalez-Pinto, Yuri Martinez-Raton, Szabolcs Varga +2
We study a fluid of two-dimensional parallel hard squares in bulk and under confinement in channels, with the aim of evaluating the performance of Fundamental-Measure Theory (FMT).…
Effect of orientational restriction on monolayers of hard ellipsoids
Szabolcs Varga, Yuri Martinez-Raton, Enrique Velasco +2
The effect of out-of-plane orientational freedom on the orientational ordering properties of a monolayer of hard ellipsoids is studied using Parsons-Lee scaling approach and replic…
Capillary and winding transitions in a confined cholesteric liquid crystal
Daniel de las Heras, Enrique Velasco, Yuri Martínez-Ratón
We consider a Lebwohl-Lasher model of chiral particles confined in a planar cell (slit pore) with different boundary conditions, and solve it using mean-field theory. The phase beh…