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  1. No Access

    Article

    Impurity diffusion in a harmonic potential and nonhomogeneous temperature

    We propose different ways of manipulating the dispersion of impurities along a semiconductor layer during heat treatment. The impurities undergo a random walk assisted by a nonlinear harmonic potential and non...

    Berhanu Aragie, Mesfin Asfaw, Lemi Demeyu… in The European Physical Journal B (2014)

  2. No Access

    Article

    Effect of thermal inhomogeneity on the performance of a Brownian heat engine

    We explore the effect of thermal inhomogeneity on the performance of a Brownian heat engine by considering exactly solvable models. We first consider a Brownian heat engine which is modeled as a Brownian parti...

    Mesfin Asfaw in The European Physical Journal B (2013)

  3. No Access

    Article

    Modeling an efficient Brownian heat engine

    We discuss the effect of subdividing the ratchet potential on the performance of a tiny Brownian heat engine that is modeled as a Brownian particle hop** in a viscous medium in a sawtooth potential (with or ...

    Mesfin Asfaw in The European Physical Journal B (2008)

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    Article

    Current, maximum power and optimized efficiency of a Brownian heat engine

    A microscopic heat engine is modeled as a Brownian particle in a sawtooth potential (with load) moving through a highly viscous medium driven by the thermal kick it gets from alternately placed hot and cold he...

    Mesfin Asfaw, Mulugeta Bekele in The European Physical Journal B - Condense… (2004)