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Autor Fernández Tejero, Carlos |
Documentos disponibles escritos por este autor (44)
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Fernández Tejero, Carlos ; Daanoun, A. ; Lekkerkerker, H. N. W. ; Baus, M. | American Physical Society | 1995-01A variational approach based on the Gibbs-Bogoliubov inequality is used in order to evaluate the free energy of simple fuids described by a double-Yukawa pair potential. A hard-sphere reference fuid is used to describe the fuid phases, and an Ei[...]![]()
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Density-functional theory within the effective-liquid approximation is applied to the problem of the isotropic-nematic transition of D-dimensional hard convex bodies. It is shown that the free-energy functional factorizes into its radial and ang[...]![]()
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The orientational freezing of a system of hard ellipses, as a first approximation for a nematogen adsorbed on a smooth substrate, is studied with the aid of an approximate density-functional theory used previously for the study of hard ellipsoid[...]![]()
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We show how a van der Waals theory of simple fluids with an interaction potential whose range has a nonmonotonic density dependence can lead to a liquid-liquid transition in close analogy to recent observations and simulations.![]()
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The fluid-solid equilibrium of a system of hard spheres with embedded classical Heisenberg spins is studied by means of computer simulation and various combinations of density functional theories with the spin-spin contributions treated at the l[...]![]()
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García Almarza, Noé ; Lomba, Enrique ; Ruiz, G. ; Fernández Tejero, Carlos | American Physical Society | 2003-02In a recent paper [Phys. Rev. Lett. 86, 2038 (2001)] a simple fluid with a particular density-dependent pair potential was shown to exhibit, together with the vapor-liquid transition, a liquid-liquid phase separation and it was evidenced that, i[...]![]()
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A novel method for evaluating two?spin correlations of a one?dimensional Ising model is described. The method is based on an algebraic technique motivated by renormalizationgroup theory and adapted for presentation in a graduatestatistical physi[...]![]()
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The exact evolution equations for the conserved densities of a one-component two-phase fluid are reduced, in each bulk phase to the corresponding linearized hydrodynamic equations and at the interface, to boundary conditions, relating the jump i[...]![]()
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The modified weighted density approximation is investigated in order to determine the thermodynamics of the ordered CsCl and NaCl structures. Our results indicate that one of the essential assumptions of the theory, namely, the uniform fluid lim[...]![]()
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The compressibility equation of a fluid with an effective, state-dependent, pair-potential is derived. It is shown that the thermodynamic states for which the infinite wavelength limit of the static structure factor diverges are not consistent w[...]![]()
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We present a new method for the study of a one-dimensional inhomogeneous Ising chain with nonconstant nearest neighbor interactions. The external field required to produce a given magnetization profile is derived exactly. Some properties of the [...]![]()
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The free energy of classical two-dimensional solids with repulsive inverse-power interactions is obtained from a recently introduced perturbation theory. We obtain very accurate results for the thermodynamics of the solid phase as compared to th[...]![]()
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Fernández Tejero, Carlos ; Daanoun, A. ; Lekkerkerker, H. N. W. ; Baus, M. | American Physical Society | 1994-08-01It is shown that strongly reducing the range of the attractions of a simple fluid will transform its phase diagram from the usual type, with a fluid-fluid critical point and a fluid-fluid-solid triple point, into its fluid-solid mirror image, wi[...]![]()
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Lomba, Enrique ; López Martín, J. L. ; Cataldo, H. M. ; Fernández Tejero, Carlos | American Physical Society | 1994-06A recently proposed entropic criterion [P.V. Giaquinta and G. Guinta, Physica A 187, 145 (1992)] for the determination of phase transitions in simple fluids is applied to two-fluid models, a purely repulsive point Yukawa fluid, and a 6-12 Lennar[...]![]()
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The pressure of the face-centered cubic hard-sphere crystal is analyzed using two different density functional theories: the generalized effective liquid approximation and the modified weighted density approximation. It is shown that in both the[...]