Title :
Digitally assisted coaxial bridge for automatic quantum Hall effect measurements at audio frequencies
Author :
Overney, Frederic ; Luond, Felix ; Jeanneret, Blaise
Author_Institution :
Fed. Inst. of Metrol. METAS, Bern-Wabern, Switzerland
Abstract :
This paper describes the principle of a new fully automatic digitally assisted coaxial bridge having a large bandwidth ranging from 100 Hz to 20 kHz. The bridge is characterized by making a 1:1 comparison between calculable ac resistors. The agreement between the calculated and the measured frequency dependence of the resistors is better than 10-7 over its entire bandwidth. Such a bridge is a perfect tool to start investigating the ac transport properties of graphene in the quantum Hall regime.
Keywords :
bridge circuits; frequency measurement; graphene; quantum Hall effect; resistors; AC resistor calculation; AC transport property; C; audio frequency measurement; automatic quantum Hall effect measurement; digitally assisted coaxial bridge; frequency 100 Hz to 20 kHz; graphene; Bridge circuits; Electrical resistance measurement; Impedance; Resistance; Standards; Voltage measurement; Windings; Metrology; bridge circuit; graphene; impedance standard; precision measurement; quantum Hall effect;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4799-5205-2
DOI :
10.1109/CPEM.2014.6898341
