• 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
    Accés obert
    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 ...
  • 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
    Accés restringit per política de l'editorial
    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 ...
  • Disorder-induced temperature fluctuations in nonequilibrium systems 

    Díaz Guilera, Albert; Torner Sabata, Lluís; Rubí Capaceti, José Miguel (1992-01)
    Article
    Accés restringit per política de l'editorial
    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
    Accés restringit per política de l'editorial
    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 ...
  • On fluctuations in interfacial fluid systems 

    Torner Sabata, Lluís; Rubí Capaceti, José Miguel; Díaz Guilera, Albert (1989-06)
    Article
    Accés restringit per política de l'editorial
    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
    Accés restringit per política de l'editorial
    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
    Accés obert
    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 ...