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  • Real-time current of a charge carrier in a strongly correlated system coupled to phonons, driven by a uniform electric field
    Vidmar, Lev ; Bonča, Janez, 1960-
    We perform a quantum time evolution of a single charge carrier doped into strongly correlated system and coupled to phonons, driven by a uniform electric field. We study a two-dimensional t-J ... -Holstein model and calculate the real-time current. At large values of electric field, the response of the system exhibits damped Bloch oscillations, and the values of the steady current decrease with increasing electric field. On the other hand, the maximal amplitude of the real-time current increase with increasing field. We discuss the appearance of the negative differential resistivity regime, observed recently in various nonequilibrium studies of interacting many-body systems.
    Source: Journal of superconductivity and novel magnetism. - ISSN 1557-1939 (Vol. 25, no. 5, 2012, str. 1255-1258)
    Type of material - article, component part ; adult, serious
    Publish date - 2012
    Language - english
    COBISS.SI-ID - 2438500

    Link(s):

    http://www.springerlink.com/content/g78178808w72252j/fulltext.pdf

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