The diffusion of electronic wave packets in one-dimensional systems with on-site, binary disorder is numerically investigated within the framework of a single-band tight-binding model. Fractal properties are incorporated by assuming that the distribution of distances between consecutive impurities obeys a power law, P () ∼ -α. For suitable ranges of α, one finds system-wide anomalous diffusion. Asymmetric diffusion effects are introduced through the application of an external electric field, leading to results similar to those observed in the case of photogenerated electron-hole plasmas in tilted InP/InGaAs/InP quantum wells. © 2008 The American Physical Society.
CITATION STYLE
Wells, P. R., D’Albuquerque E Castro, J., & De Queiroz, S. L. A. (2008). Quantum diffusion and localization in disordered electronic systems. Physical Review B - Condensed Matter and Materials Physics, 78(3). https://doi.org/10.1103/PhysRevB.78.035102
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