Enhanced magnetization at integer quantum Hall states

DOI zum Zitieren dieses Dokuments:: 10.5283/epub.11184

Meinel, I. ; Grundler, D. ; Heitmann, Detlef ; Manolescu, Andrei ; Gudmundsson, V. ; Wegscheider, Werner ; Bichler, Max

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Veröffentlichungsdatum dieses Volltextes: 30 Nov 2009 13:58

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Zusammenfassung

We report on enhancements in the magnetization of two-dimensional electron systems in the quantum Hall regime. The observed discontinuities in the magnetization exceed the predictions for interacting electrons calculated in the Hartree-Fock approximation where only the exchange enhancement of the energy gaps is taken into account. We attribute the further enhancement to many-body correlation ...