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Exciton magnetotransport in two-dimensional systems: Weak-localization effects

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Abstract

The paper considers the effect of a magnetic field B on the transport of neutral composite particles, namely excitons, in weakly disordered two-dimensional (2D) systems. In the case of classical transport (when the interference of different paths is neglected), the magnetic field suppresses exciton transport, and the static diffusion constant D(B) monotonically drops with B. When quantum-mechanical corrections due to weak localization are taken into account, D(B) becomes a nonmonotonic function of B. In weak magnetic fields, where the magnetic length is much larger than the exciton Bohr radius, ℓB=(ℏc/eB)1/2≫a B =ε ℏ2/μe 2,a positive magnetodiffusion effect is predicted, i.e., the exciton mobility should increase with B.

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Authors and Affiliations

  1. P. N. Lebedev Institute of Physics, Russian Academy of Sciences, 117924, Moscow, Russia

    P. I. Arseev

  2. Institute of General Physics, Russian Academy of Sciences, 117942, Moscow, Russia

    A. B. Dzyubenko

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  1. P. I. Arseev
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  2. A. B. Dzyubenko
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Zh. Éksp. Teor. Fiz. 114, 359–378 (July 1998)

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Arseev, P.I., Dzyubenko, A.B. Exciton magnetotransport in two-dimensional systems: Weak-localization effects. J. Exp. Theor. Phys. 87, 200–209 (1998). https://doi.org/10.1134/1.558641

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  • DOI: https://doi.org/10.1134/1.558641

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