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APS » Journals » Phys. Rev. B » Volume 65 » Issue 12
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Phys. Rev. B 65, 121312(R) (2002) [4 pages]

Determination of the resistance across incompressible strips through imaging of charge motion

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P. I. Glicofridis, G. Finkelstein*, and R. C. Ashoori
Department of Physics and Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

M. Shayegan
Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544

Received 18 October 2001; published 13 March 2002

Using charge-accumulation imaging, we measure the charge flow across an incompressible strip and follow its evolution with magnetic field. The strip runs parallel to the edge of a gate deposited on the sample and forms at positions where an exact number of integer Landau levels is filled. An RC model of charging fits the data well and enables us to determine the resistance across the strip. Surprisingly, we find that the strip becomes more resistive as its width decreases.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.65.121312
DOI:
10.1103/PhysRevB.65.121312
PACS:
73.43.-f, 73.43.Fj, 73.23.-b, 73.40.-c

*Present address: Department of Physics, Duke University, Durham, NC 27708.

 
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