Title :
AC measurements of the minimum longitudinal resistance of a QHE sample from 10 Hz to 10 kHz
Author :
Piquemal, François P M ; Trapon, Gérard R. ; Genevès, Gérard P J
Author_Institution :
Lab. Central des Ind. Electriques, Fontenay aux Roses, France
fDate :
12/1/1996 12:00:00 AM
Abstract :
AC measurements of the longitudinal resistance, Rxx, of a quantum Hall effect (QHE) sample have been made in a frequency range from 10 Hz to 10 kHz. The results show no frequency effect on the minimum value of Rxx corresponding to the quantum numbers i=2 and i=4, within the measurement resolution of 0.5 mΩ. Therefore, the influence of frequency on the value of the quantized Hall resistance, RH, should not exceed a few parts in 109 . Some unwanted effects detected during the development of the resistance bridge have been pointed out
Keywords :
III-V semiconductors; electric resistance measurement; gallium arsenide; measurement standards; quantum Hall effect; 10 Hz to 10 kHz; AC measurement; GaAs; QHE sample; frequency effect; longitudinal resistance; quantized Hall resistance; quantum Hall effect; resistance bridge; Bridge circuits; Electric breakdown; Electrical resistance measurement; Frequency measurement; Gallium arsenide; Hall effect; Probes; Quantization; Quantum capacitance; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
