Collapse of Quantized Hall Resistance and Breakdown of IQHE in GaAs/AlGaAs Heterostructures

Abstract

Collapse of quantized Hall resistance (QHR), not resulting from breakdown of the dissipationless current flow, is reported in the integer quantum Hall effect (IQHE) state with i =4 of GaAs/Al 0.3 Ga 0.7 As butterfly-type Hall bars at high Hall electric fields. The Hall electric field F H at the collapse of QHR is about 20% lower than the F H for the breakdown of the dissipationless current flow. The nature of difference between the effect of the F H on the collapse of QHR and the effect of the F H on the breakdown is discussed.