Abstract
The critical exponent of the localization length in the integral quantum Hall regime can be measured directly using the Hall-bar geometries with different sizes. We obtain a universal behavior for the three lowest Landau levels. This is in agreement with the universality prediction of the field-theoretic approach to the metal-insulator transition in the quantum Hall effect. The value of =2.30.1 agrees with recent numerical studies for the lowest Landau level. The measured value of the temperature exponent of the inelastic-scattering rate is found to range from p=2.70.3 to p=3.40.4.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 883-886 |
| Number of pages | 4 |
| Journal | Physical review letters |
| Volume | 67 |
| Issue number | 7 |
| DOIs | |
| State | Published - 1991 |
ASJC Scopus subject areas
- Physics and Astronomy(all)