Near-perfect correlation of the resistance components of mesoscopic samples at the quantum Hall regime.
We study the four-terminal resistance fluctuations of mesoscopic samples near the transition between the nu=2 and the nu=1 quantum Hall states. We observe near-perfect correlations between the fluctuations of the longitudinal and Hall components of the resistance. These correlated fluctuations appear in a magnetic-field range for which the two-terminal resistance of the samples is quantized. We discuss these findings in light of edge-state transport models of the quantum Hall effect. We also show that our results lead to an ambiguity in the determination of the width of quantum Hall transitions.
Peled
E
E
Department of Condensed Matter Physics, The Weizmann Institute of Science, Rehovot 76100, Israel.
Shahar
D
D
Chen
Y
Y
Diez
E
E
Sivco
D L
DL
Cho
A Y
AY