Magneto-optical evidence of the percolation nature of the metal-insulator transition in the two-dimensional electron system

I. V. Kukushkin, Vladimir I. Fal'ko, R. J. Haug, K. V. Klitzing, K. Eberl

    Research output: Contribution to journalArticlepeer-review

    Abstract

    We compare the results of the transport and time-resolved magnetoluminescence measurements in disordered two-dimensional (2D) electron systems in GaAs-AlxGa1-xAs heterostructures in the extreme quantum limit, particularly in the vicinity of the metal-insulator transition (MIT). At filling factors v<1, the optical signal has two components: the single-rate exponentially decaying part attributed to a uniform liquid and a power-law long-living tail specific to a microscopically inhomogeneous state of electrons. We interpret this result as a separation of the 2D electron system into liquid and localized phases, especially because the MIT occurs strikingly close to those filling factors where the liquid occupies 1/2 of the sample area (the percolation threshold condition in two-component media).

    Original languageEnglish
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume53
    Issue number20
    Publication statusPublished - 15 May 1996

    Research Beacons, Institutes and Platforms

    • National Graphene Institute

    Fingerprint

    Dive into the research topics of 'Magneto-optical evidence of the percolation nature of the metal-insulator transition in the two-dimensional electron system'. Together they form a unique fingerprint.

    Cite this