Commensurate Composite Fermions in Weak Periodic Electrostatic Potentials: Direct Evidence of a Periodic Effective Magnetic Field

DOI to cite this document:: 10.5283/epub.12749

Smet, J. H. ; Jobst, S. ; Klitzing, Klaus von ; Weiss, Dieter ; Wegscheider, Werner ; Umansky, V.

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Date of publication of this fulltext: 08 Feb 2010 13:27

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Abstract

Within the composite fermion model, it is anticipated that a periodic variation of the density in a two-dimensional electron system at half filling produces a periodic fictitious magnetic field. In regions of smaller density fictitious flux quanta are missing to compensate the external magnetic field. The observation of magnetic commensurability minima in the dc-transport response furnishes ...