A Laterally Modulated 2D Electron System in the Extreme Quantum Limit

Details A Laterally Modulated 2D Electron System in the Extreme Quantum Limit A Laterally Modulated 2D Electron System in the Extreme Quantum Limit

2003-11-18

arxiv.org/abs/cond-mat/0311400v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

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

Scientific paper

10.1103/PhysRevLett.92.036802

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 $\nu$, 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 short-wavelength, weak periodic modulation present in the 2DES qualitatively explain the data.

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