Now showing items 1-13 of 13

  • Asymptotic analysis of the Gunn effect with realistic boundary conditions 

    Bonilla, L. L.; Rodríguez Cantalapiedra, Inma; Gomila Lluch, Gabriel; Rubí Capaceti, José Miguel (The American Physical Society, 1997-08-31)
    Article
    Open Access
    A general asymptotic analysis of the Gunn effect in n-type GaAs under general boundary conditions for metal-semiconductor contacts is presented. Depending on the parameter values in the boundary condition of the injecting ...
  • Ballistic adsorption of colloidal magnetic particles 

    Pastor Satorras, Romualdo; Rubí Capaceti, José Miguel (1999-11-29)
    Article
    Restricted access - publisher's policy
    We present a new model of sequential adsorption in which the adsorbing particles experience anisotropic dipolar interactions. These long-range interactions induce highly ordered structures in the adsorbed layer at low ...
  • Boundary effects in the Rayleigh line for a fluid out of thermal equilibrium 

    Rubí Capaceti, José Miguel; Pagonabarraga, I.; Torner Sabata, Lluís (1990-11)
    Article
    Restricted access - publisher's policy
    We analyze the effect of boundary conditions in the Rayleigh spectrum of a fluid under a temperature gradient. A specific wave vector geometry prevents coupling between temperature and velocity fluctuations and could make ...
  • Breaking of scale invariance symmetry in adsorption processes 

    Pastor Satorras, Romualdo; Rubí Capaceti, José Miguel (2000-08)
    Article
    Open Access
    Standard models of sequential adsorption are implicitly formulated in a scale invariant form, by assuming adsorption on an infinite surface, with no characteristic length scales. In real situations, however, involving ...
  • Dipolar interactions induced order in assemblies of magnetic particles 

    Pastor Satorras, Romualdo; Rubí Capaceti, José Miguel (2000-10-27)
    Article
    Open Access
    We discuss the appearance of ordered structures in assemblies of magnetic particles. The phenomenon occurs when dipolar interactions and the thermal motion of the particles compete, and is mediated by screening and excluded ...
  • Disorder-induced temperature fluctuations in nonequilibrium systems 

    Díaz Guilera, Albert; Torner Sabata, Lluís; Rubí Capaceti, José Miguel (1992-01)
    Article
    Restricted access - publisher's policy
    The authors study the effects on heat diffusion related to the presence of a quenched disorder of impurities at the boundaries. A simple lattice model summarizes the main characteristics of the surface through which the ...
  • Finite-size effects in nonequilibrium correlation functions 

    Torner Sabata, Lluís; Rubí Capaceti, José Miguel (1991-07)
    Article
    Restricted access - publisher's policy
    We have shown that finite-size effects in the correlation functions away from equilibrium may be introduced through dimensionless numbers: the Nusselt numbers, accounting for both the nature of the boundaries and the size ...
  • Fractal properties of cluster of colloidal magnetic particles 

    Pastor Satorras, Romualdo; Rubí Capaceti, José Miguel (1998-05)
    Article
    Restricted access - publisher's policy
    We have studied the properties of clusters of colloidal magnetic particles generated from a 2D aggregation model with dipolar interparticle interactions. Particles diffuse off-lattice, experiencing dipolar 1 with the already ...
  • Long-range-interaction induced ordered structures in deposition processes 

    Pastor Satorras, Romualdo; Rubí Capaceti, José Miguel (American Institute of Physics (AIP), 1998-06-15)
    Article
    Open Access
    We present a new model of sequential adsorption in which the adsorbing particles experience dipolar interactions. We show that in the presence of these long-range interactions, highly ordered structures in the adsorbed ...
  • Model of correlated sequential adsorption of colloidal particles 

    Pastor Satorras, Romualdo; Rubí Capaceti, José Miguel (2001-06-11)
    Article
    Open Access
    We present results of a model of sequential adsorption in which the adsorbing particles are correlated with the particles attached to the substrate. The strength of the correlations is measured by a tunable parameter s. ...
  • On fluctuations in interfacial fluid systems 

    Torner Sabata, Lluís; Rubí Capaceti, José Miguel; Díaz Guilera, Albert (1989-06)
    Article
    Restricted access - publisher's policy
    We study the propagation of the temperature fluctuations in a system in the presence of an interface. Such fluctuations originate from surface noise sources which are introduced through the random parts of the interfacial ...
  • Spatial correlations for temperature fluctuations from surface noise 

    Rubí Capaceti, José Miguel; Díaz Guilera, Albert; Torner Sabata, Lluís (1987-02)
    Article
    Restricted access - publisher's policy
    The equal-time or static temperature correlation function from fluctuations originated at a surface is computed. Such fluctuations come from a random heat flux appearing in Newton's law of cooling. The correlation is studied ...
  • Stationary states and phase diagram for a model of the Gunn effect under realistic boundary conditions 

    Gomila Lluch, Gabriel; Rubí Capaceti, José Miguel; Rodríguez Cantalapiedra, Inma; Bonilla, L. L. (The American Physical Society, 1997-08-01)
    Article
    Open Access
    A general formulation of boundary conditions for semiconductor-metal contacts follows from a phenomenological procedure sketched here. The resulting boundary conditions, which incorporate only physically well-defined ...