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Phys. Rev. Lett. 92, 036802 (2004) [4 pages]

Laterally Modulated 2D Electron System in the Extreme Quantum Limit

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S. Melinte1, Mona Berciu2,*, Chenggang Zhou1, E. Tutuc1, S. J. Papadakis1, C. Harrison3, E. P. De Poortere1, Mingshaw Wu3, P. M. Chaikin3, M. Shayegan1, R. N. Bhatt1, and R. A. Register4
1Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA
2Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
3Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
4Department of Chemical Engineering, Princeton University, Princeton, New Jersey 08544, USA

Received 27 May 2003; published 21 January 2004

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 ν, 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.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.036802
DOI:
10.1103/PhysRevLett.92.036802
PACS:
73.40.Rw, 71.70.Di, 73.43.Fj

*Corresponding author.

Email address: berciu@physics.ubc.ca

 
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