Enhanced magnetization at integer quantum Hall states

DOI to cite this document:: 10.5283/epub.11184

Meinel, I. ; Grundler, D.

; Heitmann, Detlef ; Manolescu, Andrei

; Gudmundsson, V.

; Wegscheider, Werner ; Bichler, Max

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Date of publication of this fulltext: 30 Nov 2009 13:58

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Abstract

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 ...