Abstract
Current induced breakdown of the integer quantum Hall effect (QHE) is studied in GaAs AlGaAs single heterostructure Hall bars at –4.2 K and –6 T ( , 4, and 6). The QHE breakdown is absent over a macroscopic region in the two-dimensional electron gas channel on the side of the electron-injecting corner of the Hall bars. The observed nonlocal nature suggests that bootstrap-type electron heating is relevant to the QHE breakdown.
- Received 25 March 1996
DOI:https://doi.org/10.1103/PhysRevLett.77.558
©1996 American Physical Society