Quantization of the diagonal resistance : density gradients and the empirical resistance rule in a 2D system.
Journal Article
·
· Proposed for publication in Physical Review Letters.
- Columbia University, New York, NY
- National High Magnetic Field Laboratory, Tallahassee, FL
- Lucent Technologies, Murray Hill, NJ
- Princeton University, NJ
We have observed quantization of the diagonal resistance, R{sub xx}, at the edges of several quantum Hall states. Each quantized R{sub xx} value is close to the difference between the two adjacent Hall plateaus in the off-diagonal resistance, R{sub xy}. Peaks in R{sub xx} occur at different positions in positive and negative magnetic fields. Practically all R{sub xx} features can be explained quantitatively by a 1%/cm electron density gradient. Therefore, R{sub xx} is determined by Rxy and unrelated to the diagonal resistivity {rho}{sub xx}. Our findings throw an unexpected light on the empirical resistivity rule for 2D systems.
- Research Organization:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 970678
- Report Number(s):
- SAND2005-3098J; TRN: US201003%%43
- Journal Information:
- Proposed for publication in Physical Review Letters., Journal Name: Proposed for publication in Physical Review Letters.
- Country of Publication:
- United States
- Language:
- English
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