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

fYear

2014

fDate

24-29 Aug. 2014

Firstpage

226

Lastpage

227

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on

Conference_Location

Rio de Janeiro

ISSN

0589-1485

Print_ISBN

978-1-4799-5205-2

Type

conf

DOI

10.1109/CPEM.2014.6898341

Filename

6898341