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Subsurface charge accumulation imaging of a quantum Hall liquid

Author

Listed:
  • S. H. Tessmer

    (Massachusetts Institute of Technology
    Michigan State University)

  • P. I. Glicofridis

    (Massachusetts Institute of Technology)

  • R. C. Ashoori

    (Massachusetts Institute of Technology)

  • L. S. Levitov

    (Massachusetts Institute of Technology)

  • M. R. Melloch

    (Purdue University)

Abstract

The unusual properties of two-dimensional electron systems that give rise to the quantum Hall effect have prompted the development of new microscopic models for electrical conduction1,2,3,4,5,6. The bulk properties of the quantum Hall effect have also been studied experimentally using a variety of probes including transport7,8, photoluminescence9,10, magnetization11 and capacitance12,13 measurements. However, the fact that two-dimensional electron systems typically exist some distance (about 1,000 Å) beneath the surface of the host semiconductor has presented an important obstacle to more direct measurements of microscopic electronic structure in the quantum Hall regime. Here we introduce a cryogenic scanning-probe technique—‘subsurface charge accumulation’ imaging—that permits very high resolution examination of systems of mobile electrons inside materials. We use this technique to image directly the nanometre-scale electronic structures that exist in the quantum Hall regime.

Suggested Citation

  • S. H. Tessmer & P. I. Glicofridis & R. C. Ashoori & L. S. Levitov & M. R. Melloch, 1998. "Subsurface charge accumulation imaging of a quantum Hall liquid," Nature, Nature, vol. 392(6671), pages 51-54, March.
    • Handle: RePEc:nat:nature:v:392:y:1998:i:6671:d:10.1038_32112
    DOI: 10.1038/32112
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