Abstract
Two-terminal resistance (R) measurements are used to investigate the low-temperature (T<1.4 K) Hall effect in GaAs/As quantum wires with a geometrical width smaller than 400 nm, in order to eliminate the possible invasive influence of (Hall) voltage leads in standard four-terminal (Hall-bar-type) configurations. Experiment shows that although R assumes a temperature- and length-independent value near integral filling factors, i.e., →0, the remaining Hall resistance R= exhibits a finite slope vs B unlike two-dimensional systems. The results suggest that long disordered electronic wires can exhibit an ordinary Hall effect in the vicinity of integral filling factors.
- Received 6 October 1993
DOI:https://doi.org/10.1103/PhysRevB.51.2584
©1995 American Physical Society