Recombination kinetics of acceptor-bound holes in heterostructures: A probe of the local configuration of magnetically frozen electron insulators

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    Abstract

    We show that the kinetics of recombination of holes bound at acceptors from a δ-doped monolayer in a heterostructure with magnetically frozen two-dimensional (2D) electrons evolves according to the power law I(t)t-1. This behavior is universal for any kind of 2D electron insulator (ordered or disordered) in the ultra-quantum-limit and follows over a wide time range after the photoexcitation pulse. The difference between ordered and random insulating phases shows up at the longest time delays: The ordering of electrons into a Wigner lattice yields an asymptotical single lifetime decay tail, with a recombination rate whose temperature dependence is described by the characteristic Debye-Waller-type factor.

    Original languageEnglish
    Pages (from-to)2242-2245
    Number of pages4
    JournalPhysical Review B
    Volume49
    Issue number3
    DOIs
    Publication statusPublished - 1994

    Research Beacons, Institutes and Platforms

    • National Graphene Institute

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