Laterally modulated 2D electron systems in the extreme quantum limit.

2003/11/18 by Sorin Melinte, Mona Berciu, C. Zhou +13 · 6 citations
Physics and Astronomy · #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #Surface and Thin Film Phenomena #Topological Materials and Phenomena #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.92.036802

4 pages, 5 figures. to appear in Phys. Rev. Lett

arxiv created 2003/11/18 · openalex publication_date 2004/01/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/11

Abstract

We report on magnetotransport of a two-dimensional electron system (2DES), located 32 nm below the surface, with a surface superlattice gate structure of periodicity 39 nm imposing a periodic modulation of its potential. For low Landau level fillings , the diagonal resistivity displays a rich pattern of fluctuations, even though the disorder dominates over the periodic modulation. Theoretical arguments based on the combined effects of the long-wavelength, strong disorder and the shortwavelength, weak periodic modulation present in the 2DES qualitatively explain the data.

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