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Evidence of Hofstadter's Fractal Energy Spectrum in the Quantized Hall Conductance

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Albrecht, C. ; Smet, J. ; Klitzing, K. ; Weiss, Dieter ; Umansky, V. ; Schweizer, H.
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Date of publication of this fulltext: 05 Aug 2009 13:57


The energy spectrum of a two-dimensional electron system in a perpendicular homogeneous magnetic field and a weak lateral superlattice potential with square symmetry is composed of Landau bands with recursive internal subband structure. The Hall conductance in the minigaps is anticipated to be quantized in integer multiples of e2/h that vary erratically from minigap to minigap in ...


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