Controlling losses with gates and shields to perfect a quantum Hall impedance standard

Schurr, Jürgen; Kibble, Bryan P.; Hein, Günter; Pierz, Klaus

doi:https://doi.org/10.1109/tim.2008.2006961

Zugriffsnummer	23253
Dokumenttyp	Konferenzartikel in Zeitschrift
Sprache	Englisch
Titel	Controlling losses with gates and shields to perfect a quantum Hall impedance standard
Autor(in); Institution	Schurr, Jürgen; 2.6, Elektrische Quantenmetrologie, PTB-Braunschweig Kibble, Bryan P.; 2.6, Elektrische Quantenmetrologie, PTB-Braunschweig Hein, Günter; PTB-Braunschweig, retired staff Pierz, Klaus; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Quelle/Jahr	IEEE Transactions on Instrumentation and Measurement: 58 (2009), 4, 973 - 979
ISSN	0018-9456
DOI	https://doi.org/10.1109/tim.2008.2006961
Verlag	New York, NY: IEEE
Konferenzangaben	2008 Conference on Precision Electromagnetic Measurements, Broomfield, CO, 08-13, June, 2008, USA
Freie Schlagworte	ac quantum Hall effect ; back gate ; impedance ; loss tangent ; polarization losses ; side gate
Zusammenfassung	We report new results and insights concerning the effect of side-gates, back-gates, and ac losses on the ac properties of the quantum Hall resistance. Three different loss mechanisms have been identified (dissipative losses in the 2DEG, relaxation losses in a surface layer above the 2DEG, and dielectric losses in the GaAs substrate). A novel shielding configuration reduces the effect of these loss mechanisms and makes the ac quantum Hall resistance independent of frequency and current to better than 1 part in 10⁸ at frequencies around 1 kHz.

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Schurr, J., Kibble, B. P., Hein, G., & Pierz, K. (2009). Controlling losses with gates and shields to perfect a quantum Hall impedance standard. IEEE Transactions on Instrumentation and Measurement, 58(4), 973–979. https://doi.org/10.1109/tim.2008.2006961

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