Enhancement of the spin-gap in fully occupied two-dimensional Landau levels - Condensed Matter > Mesoscale and Nanoscale PhysicsReport as inadecuate




Enhancement of the spin-gap in fully occupied two-dimensional Landau levels - Condensed Matter > Mesoscale and Nanoscale Physics - Download this document for free, or read online. Document in PDF available to download.

Abstract: Polarization-resolved magneto-luminescence, together with simultaneousmagneto-transport measurements, have been performed on a two-dimensionalelectron gas 2DEG confined in CdTe quantum well in order to determine thespin-splitting of fully occupied electronic Landau levels, as a function of themagnetic field arbitrary Landau level filling factors and temperature. Thespin splitting, extracted from the energy separation of the \sigma+ and \sigma-transitions, is composed of the ordinary Zeeman term and a many-bodycontribution which is shown to be driven by the spin-polarization of the 2DEG.It is argued that both these contributions result in a simple, rigid shift ofLandau level ladders with opposite spins.



Author: J. Kunc, K. Kowalik, F. J. Teran, P. Plochocka, B. A. Piot, D. K. Maude, M. Potemski, V. Kolkovsky, G. Karczewski, T. Wojtowicz

Source: https://arxiv.org/



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