AC and DC Quantum Hall Measurements in GaAs-Based Devices at Temperatures Up To 4.2 K

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F18%3AN0000096" target="_blank" >RIV/00177016:_____/18:N0000096 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21230/19:00326223
Result on the web
<a href="https://ieeexplore.ieee.org/document/8574978" target="_blank" >https://ieeexplore.ieee.org/document/8574978</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/TIM.2018.2882216" target="_blank" >10.1109/TIM.2018.2882216</a>

Result language
angličtina
Original language name
AC and DC Quantum Hall Measurements in GaAs-Based Devices at Temperatures Up To 4.2 K
Original language description
In this paper, we describe ac and dc quantum Hall effect measurements at temperatures above 1.5 K, which is beyond the commonly used value for high precision measurements of the quantum Hall resistance (QHR). It is shown that GaAs devices with high electron density of about 5 × 10 11 cm 2 can be used as reliable dc resistance quantum standards with quantization of R H (2) value with accuracy within a few parts in 10 9 even at temperatures up to 4.2 K. The devices have exhibited well-developed quantum Hall plateaus in the ac regime too, again at temperatures up to 4.2 K. The measurement system consists of a self-made cryogenic probe with TO-8 type socket together with coaxial wiring and a digitally assisted bridge suitable for ac quantum Hall effect measurements. The experiments were performed with devices placed in new double-shielded TO-8 holders. Our investigations and the evaluation of the measurement system are dedicated for the future realization of the quantum impedance standard based on ac QHR.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
<a href="/en/project/7AX13027" target="_blank" >7AX13027: Automated impedance metrology extending the quantum toolbox for electricity</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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