Laterally Modulated 2D Electron System in the Extreme Quantum Limit

S. Melinte, Mona Berciu, Chenggang Zhou, E. Tutuc, S. J. Papadakis, C. Harrison, E. P. De Poortere, Mingshaw Wu, P. M. Chaikin, M. Shayegan, R. N. Bhatt, and R. A. Register
Phys. Rev. Lett. 92, 036802 – Published 21 January 2004

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 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.

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  • Received 27 May 2003

DOI:https://doi.org/10.1103/PhysRevLett.92.036802

©2004 American Physical Society

Authors & Affiliations

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

  • *Corresponding author. Email address: berciu@physics.ubc.ca

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Vol. 92, Iss. 3 — 23 January 2004

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